1. small lamp which is used as a pointer. ledled (l&ebreve;d), imp. & p. p. of lead.led captain. an obsequious follower or attendant. [obs.]led horse, a sumpter horse, or a spare horse, that is led along. [led having leadership guidance [ant: unled] diode such that light emitted at a p-n junction is proportional to the bias current; color depends on the material used [syn: light-emitting diode, led]