What is "idiomatical"

Idiomatic \Id`i*o*mat"ic\, Idiomatical \Id`i*o*mat"ic*al\, a.

1. Of or pertaining to, or conforming to, the mode of expression peculiar to a language; as, an idiomatic meaning; an idiomatic phrase. -- Id`i*o*mat"ic*al*ly, adv.

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.

a. idiomatic

adj. of or relating to or conforming to idiom; "idiomatic English" [syn: idiomatic]