What is "pretermission"

Pretermission \Pre`ter*mis"sion\, n. [L. praetermissio. See Pretermit.]

1. The act of passing by or omitting; omission.
   --Milton.

2. (Rhet.) See Preterition.

1580s, from Latin pretermissionem (nominative pretermissio), noun of action from past participle stem of praetermittere (see pretermit).

n. 1 omission (act of omitting to do something) 2 preterition

n. letting pass without notice