n. & v.
n. 1 (in a painting etc.) a light area, or one seeming to reflect light. 2 a moment or detail of vivid interest; an outstanding feature. 3 (usu. in pl.) a bright tint in the hair produced by bleaching.
v.tr. 1 a bring into prominence; draw attention to. b mark with a highlighter. 2 create highlights in (the hair).