n. & v.
n. 1 a title or brief explanation appended to an illustration, cartoon, etc. 2 wording appearing on a cinema or television screen as part of a film or broadcast. 3 the heading of a chapter or article etc. 4 Law a certificate attached to or written on a document.
v.tr. provide with a caption.
[ ME f. L captio f. capere capt- take ]