comma Meaning, Definition & Usage

  1. noun a punctuation mark (,) used to indicate the separation of elements within the grammatical structure of a sentence
  2. noun anglewing butterfly with a comma-shaped mark on the underside of each hind wing
    comma butterfly; Polygonia comma.

WordNet

Com"ma noun
Etymology
L. comma part of a sentence, comma, Gr. clause, fr. to cut off. Cf. Capon.
Definitions
  1. A character or point [,] marking the smallest divisions of a sentence, written or printed.
  2. (Mus.) A small interval (the difference beyween a major and minor half step), seldom used except by tuners.

Webster 1913