Meaning of en passant

en pas•sant

Pronunciation: (än" pa-sänt' Fr. än pä-sän'), [key]
  1. (italics)in passing; by the way.
  2. a method by which a pawn that is moved two squares can be captured by an opponent's pawn commanding the square that was passed.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.