1. One of the four logical ways in which perception, memory, or description/depiction can transform an experience that is ostensibly merely reproduced. Deletion involves omitting one or more elements which were part of the original source material. For example, in reporting our behaviour on a given occasion we may consciously or unconsciously omit features which are not consonant with our self-image. See also addition; substitution; transformation; transposition.
2. In rhetoric, detractio, one of Quintilian's four types of rhetorical figures of speech involving deviation (mutatio): in this case, the omission of elements, e.g. of conjunctions (asyndeton).