n. A horseman; a knight; a cavalier; a gallant soldier.n. The lowest title of rank in the old French nobility.n. A member or knight of an honorable order, especially one who holds the lowest rank in such an order when there are more ranks than one: as, a chevalier of the Legion of Honor. The word in this sense is not used as a title of address. Compare cavalier.n. In heraldry, an armed knight, usually mounted. If mounted, the blazon should state the fact.n. In ornithology, an old and disused name of the greenshank, redshank, and other birds of the genus Totanus. Also called gambet and horseman