1. peerless, matchless, unparalleled, incomparable (also unequaled). unequalled radically distinctive and without equal; he is alone in the field of microbiology; this theory is altogether alone in its penetration of the problem; bach was unique in his handling of counterpoint; craftsmen whose skill is unequaled; unparalleled athletic ability; a breakdown of law unparalleled in our history [syn: alone(p) , unique, unequaled, unparalleled]