noun, noun which may take the genitive case particle 'no'
unparalleled in the present age; matchless today
A yojijukugo used to describe someone or something that has no equal in the current era. Often used in formal or literary contexts to praise exceptional talent, skill, or achievement.
He was praised as a swordsman unparalleled in the present age.
This work is a masterpiece without equal today.
天下無双 means 'unparalleled under heaven' (in the whole world), while 当代無双 specifically limits the scope to the present era.
古今無双 means 'unparalleled in all ages' (past and present), whereas 当代無双 focuses only on the current age.
A yojijukugo composed of 当代 (present age) and 無双 (matchless, unparalleled). The exact historical origin is uncertain, but it follows the common pattern of combining a time scope with 無双 to express supreme excellence within that scope.