Widely recognised as authoritative, standard, or definitive within a field

Late Latin canonicus, from Greek kanon, 'rule' or 'standard'

Authoritative Standard Definitive
Apocryphal Unorthodox
"The canonical evidence for the claim that governance quality conditions the return on public health spending comes from Rajkumar and Swaroop's cross-country study of under-five mortality."

Use to flag a study, case or precedent as the reference point of a field in a Mains answer, e.g., 'the canonical judgment on the basic structure doctrine remains Kesavananda Bharati (1973).'

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