D defs.my
Entry 2 senses Webster, 1913

Idiomatic

/ĭd′ē-ə-măt′ĭk/ · Id·i·o·mat·ic · IPA /ˌɪd.i.əˈmæt.ɪk/
01 a. Of or pertaining to, or conforming to, the mode of expression peculiar to a language; as, an idiomatic meaning; an idiomatic phrase.
  1. 1.
    Of or pertaining to, or conforming to, the mode of expression peculiar to a language; as, an idiomatic meaning; an idiomatic phrase.
  2. 2.
    Of or pertaining to, or of the nature of an idiom{3}; having a meaning that is peculiar to itself and not predictable from general rules. See: idiom