1. (

• odd ,
• unmatched ,
• unmated ,
• unpaired

) of the remaining member of a pair; "unpaired socks"; "an odd glove" ;

2. (

• matchless ,
• nonpareil ,
• one ,
• one_and_only ,
• peerless ,
• unmatched ,
• unmatchable ,
• unrivaled ,
• unrivalled

) 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" ;