De minimis is a Latin expression meaning about minimal things, which is mostly used as part of de minimis non curat praetor, in the sense that law is not interested in trivial matters.
De minimis, in a more formal legal sense, means something which is beneath judicial notice.
For example, in European Union Competition law companies which indulge in anti-competitive practices, but which have a market share of under 5% often escape censure by the European Commission because such activities are regarded as de minimis.
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