Definition of commas:
(n) :
(typography) The punctuation mark ⟨,⟩ used to indicate a set of parts of a sentence or between elements of a list.
(n) :
(genetics) A delimiting marker between items in a genetic sequence.
(n) :
(figurative) A brief interval.
(n) :
(Romanian typography) A similar-looking subscript diacritical mark.
(n) :
(entomology) Any of various nymphalid butterflies of the genus Polygonia, having a comma-shaped white mark on the underwings, especially Polygonia c-album and Polygonia c-aureum of North Africa, Europe, and Asia.
(n) :
(music) A difference in the calculation of nearly identical intervals by different ways.