An incomplete list of words having different primary meanings in British English and American English. Note: Many of the definitions are recognized by the other as "Britishisms" (sic) or Americanisms respectively.

Many American phrases (and their meanings) are now increasingly used in the UK, thanks to the ubiquity of US-made movies and television programes.

''See also:

Word most common British meaning most common American meaning
alternatelyevery other oneas an alternative
ass donkey or burro arse (buttocks)
also donkey
Asian coming from India, Pakistan etc.; South Asian East Asian, continental Southeast Asian
see also "oriental"
band a strap a jewelry ring for the finger (wedding band)
less commonly used in the context of a strap
billion thousand million
million million (earlier meaning; now less common)
thousand million
bird usually an avian but can also be a slang term for a female almost always an avian
biscuit cracker (or cookie) similar to a scone or Welsh cake, except without any fruits or nuts
boob tube tube top slang term for television
bugger someone who engages in buggery, or in non-polite company as a form of address (e.g. ..he's a generous bugger anyway) Term of endearment, often used for children. Appears to have no vulgar or insulting connotation.
bum butt (buttocks) hobo, homeless person.
sometimes buttocks (understood as Britishism)
brew (noun) a cup of tea a beer, or coffee drink
café diner coffee shop
chemist pharmacist, pharmacy
also a practitioner of chemistry
a person whose profession is chemistry
chips french fries crisps
chippy carpenter or fish and chip shop loose woman (rare)
chum buddy (usually ironic) a friend
waste products from fish processing (heads, tails, blood etc.) often used for shark fishing.d
dead beat, deadbeat exhausted a welsher, someone who does not pay their debts
drop (of liquid) several ounces (of tea, for example) a droplet (less than a milliliter)
dummy pacifier
fool
mannequin, esp. for automobile crash tests
fake
fool
entrée starter (first course) of a meal main course of a meal
fag cigarette, a young public school boy who acts as a servant for older pupils short for faggot, an insulting term for a male homosexual (also British)
fanny vagina buttocks (not obscene)
first floor (of a building) the floor above ground level the floor at ground level
flashlight Device that emits a flashing light Device that emits a continuous light (British lantern)
fly-over Elevated road section, i.e. long road bridge. Ceremonial aircraft flight (British fly-past).
Higher-level road bridge that goes above both a lower bridge and a road below the lower bridge.
garage parking lot mechanic shop
parking space at home
gas Natural gas Gasoline
geezer gangster, man old person (derogatory)
ground floor (of a building) The floor at ground level. Sometimes used thus, but American English prefers 'first floor'.
Lower of two floors that are each at a different ground level due to sloping terrain.
homely (Of a house) Comfortable, cozy, rustic.
(Of a person) Home-loving, domesticated, house-proud.
(Only used of a person) Plain, Ugly.
hunting pursuing animals on horseback pursuing animals on foot (Btitish shooting or stalking)
indicator turn signal in a car a gauge or measure
jock Slang term for a Scotsman or a Scots dog. Slang term for an athlete
jumper sweater pinafore dress
knock up manufacture hastily
practise before tennis
wake up by knocking
make pregnant
make pregnant
lantern device that emits a continuous light (American flashlight) device that burns liquid to produce light
let allow
rent (an apartment)
allow
rent (rarely)
line a line a queue
lounge living room noun: a bar (pub);
verb: to laze about, to relax (also British)
lush (of a person) attractive (usually used by women in reference to men) an alcoholic
mad insane
occasionally used to mean angry
angry
occasionally used to mean insane
mate friend spouse
mean stingy, miserly, selfish angry, cruel, vicious
momentarily for a moment in a moment; very soon
muffler scarf silencer on automobile/car/gramophone
on the telephone (on the phone) to be talking on the telephone or (rare) to possess a working telephone to be talking on the telephone
oriental East Asian, continental Southeast Asian East Asian. increasingly considered slightly condescending or politically incorrect.
outside lane the lane closest to the median or central reservation. the lane furthest from the median or central reservation. In both cases this will be the rightmost lane.
pants underpants (usu y-fronts)
(slang) bad or undesired
trousers
paraffin kerosene a waxy fraction of petroleum commonly used to make candles (British "paraffin wax")
pavement sidewalk asphalt; the road surface
period menstruation
section of time
full stop
section of time
menstruation
pint, quart, gallon Approx. 1.2 times US measure (mnemonic: "a pint of water weighs a pound and a quarter") Approx. 5/6 British (imperial) measure (mnemonic: "a pint's a pound the world around", which it plainly isn't)
pissed (of a person) drunk angry (British use pissed off for this) (pissed off is common for Americans too)
public school fee-paying private school state-supported school
pud short for pudding, as in "Christmas Pud" (rhymes with good) penis (rhymes with mud) (rare slang, usually used with "pulling")
quite good mediocre, acceptable, good, well done (ironic, according to subtle voice intonation) excellent
(to) ring to call (someone) by telephone to make a bell-like sound; you cannot ring people unless they are wearing a bell. (Note: "To give someone a ring" is to call someone in British English, while in American English it's to give an ornamental band to someone). Also understood as "to call on the telephone" when said as "here's my number, give me a ring when you can" or similarly.
a rubber a pencil eraser
can also mean condom
a condom
rubbish garbage; trash understood by Americans as a Britishism unless referring to arguments, where bad arguments are called rubbish
shag to copulate, or copulate with a type of carpet
a kind of a dance
to copulate (understood as Britishism; popularized by Austin Powers movies)
shattered exhausted
broken
broken
shop store (retail) workshop
also store
silencer silences car/automobile (muffler)
silences a gun (rare)
silences a firearm
skillet (regional dialect) a frying pan
a type of stir-fried food item
a frying pan, often cast iron
a long-handled stewing pan or saucepan, often having short legs or feet
(to) slate to disparage to schedule, such as "slated for demolition"
solicitor lawyer door-to-door salesman
(rarely) in the context of Solicitor General, the person who represents the United States before the Supreme Court
spunk semen (though also sometimes used for courage, sauciness) courage, sauciness (though also sometimes used for semen)
squash fruit cordial drink (squash (drink))
a sport (squash (sport))
(rarely) (squash (vegetable))
vegetable
to crush, as a bug
(rarely) the sport
subway pedestrian underpass underground rail system
suspenders elasticated support for stockings elasticated support for trousers (i.e. braces)
(to) table
(parliamentary procedure)
to raise for consideration (i.e. to bring to or put on the table) to suspend from consideration (to shelve) (i.e. to leave on the table)
tailgater a motorist who follows another vehicle too closely someone who picnics from the rear of a vehicle (also British meaning)
tap faucet device for dispensing beer from a keg
(equal use as faucet)
Also used in "a phone tap"
tea A beverage, usually taken hot with milk
variously an afternoon snack or an evening meal
a beverage, hot or in some regions taken cold with lemon and/or sugar
tights nylons which also cover the groin (American pantyhose) skin-tight pants or pants and top, such as worn by gymnasts
torch flashlight or burning stick burning stick, such as a tiki torch
tramp a homeless person a loose woman
sometimes a homeless person, as in the movie Lady and the Tramp
tyke an insulting term for someone from Yorkshire. term of endearment for a child, like "little rascal"
valve tube or vacuum tube device to start, stop or regulate flow
vest equivalent of an undershirt in US equivalent of waistcoat in the UK (kevlar vest)
wash up wash the dishes (more generally, to clean after eating food) wash your hands (more generally, to clean before eating food)
way out exit (on a sign) extreme (as in "way out there")