eminent beyond or above comparison; "matchless beauty"; "the team's nonpareil center fielder"; "she's one girl in a million"; "the one and only Muhammad Ali"; "a peerless scholar"; "infamy unmatched in the Western world"; "wrote with unmatchable clarity"; "unrivaled mastery of her art"

Having no equal; unequaled.

Unlike each other; unequal; unsuited.

Matchless is one of the oldest marques of British motorcycles with the first models manufactured at the start of the 20th century.