Noscitur a sociis describes the approach that the meaning of a word or phrase in a statute, contract or other legal instrument is determined by the words that surround it. Where a term is ambiguous, it “takes colour” from its neighbours so that the provision is read as a coherent whole.
This is a common law maxim of construction recognised in case law across England and Wales, Scotland, Northern Ireland and Ireland; it is not defined by legislation. Courts use it in statutory interpretation, contractual construction, and reading wills and commercial documents.
Typical use: to confine a wide or general word in a list to the same class as the accompanying words, or to avoid an over-broad or unintended reading suggested by literalism. It operates alongside the purposive approach and related canons (such as ejusdem generis), but cannot defeat clear language or the scheme of the Act or instrument. The entire context—including the section, schedule and surrounding provisions—matters.
Practically, lawyers invoke noscitur a sociis to support arguments about narrow or contextual meanings, to reconcile drafting inconsistencies, and to resolve ambiguity where dictionary meaning alone is inconclusive.