An omission; spec. (in medieval computation) the omission of a day in the reckoning of the lunar month (cf. leap year, n.). Now archaic.

The action of omitting, leaving out, or not including a person or thing.

omission.

setting by: setting aside, not counting.

= omission, n.

The cutting out or suppression of any information, esp. a passage in a book or part of an account; an instance of this. Also figurative.

Scottish. An act of passing over or ignoring something in speech or writing; an intentional omission. Obsolete.