Unlike something else in terms of condition, character, etc.; (sometimes spec.) incomparable, peerless. Chiefly in predicative use with a noun or…

Without an equal; matchless, peerless. Now archaic and regional.

Incomparable.

Without peer; unequalled, matchless.

Chiefly in predicative use. That is the sole example of something; that is the only one of its kind; unique; (sometimes) spec. without peer, without…

= incomparable, adj. Obsolete.

Unsurpassable. In quot. as n.: the one who cannot be surpassed.

One and only. Singular, unique, unrivalled.

With which there is no comparison; unequalled in manner, kind, or degree; matchless, peerless, transcendent.

As adj. phr.: Without equal, peerless. Also occasionally adv.: As one that has no equal. Often used as a proper name or surname; hence n., a person…

Having no equal; unrivalled, incomparable, peerless, unique. In later use frequently as postmodifier.

That cannot be ‘beaten’ or excelled; unsurpassable. Obsolete.

Having no match; without an equal or peer; incomparable.

Incapable of being imitated; surpassing or defying imitation; without compare; peerless.

Incapable of being matched or equalled; incomparable, peerless, unparalleled. Also with by.

Not matched or equalled; incomparable; unparalleled. Also occasionally as n.

Incapable of being transcended or exceeded; unsurpassable. Obsolete.

attributive. One and only; singular. Unique in quality, character, rank, etc.; peerless, best; = only, adj. 3a. Obsolete.

Not of equal value; unequalled in value, matchless.

Unrivalled, matchless, unparalleled. Obsolete.

= unparagoned, adj.

In the superlative, with emphatic force. Now chiefly colloquial and regional.

Chiefly poetic. Without peer, equal, or parallel; matchless; unique.

(un-, prefix1 affix 1b)

Without compare, peerless, incomparable.

Unmatched, matchless, peerless, incomparable.

Matchless; incomparable.

(un-, prefix1 affix 2.)

Unrivalled, unparalleled, incomparable. rare and archaic in later use.

Without an equal; matchless.

That cannot be matched or equalled; unmatchable.

Having no parallel or equal; exceptional.

(un-, prefix1 affix 2.)

Unequalled, unrivalled; peerless.

Without parallel, matchless, unparalleled.

Incapable of being matched or equalled; peerless.

Without rivals; unequalled, matchless.

Unmatched, unequalled.

Having no preceding or similar example; unprecedented, unparalleled.

Incapable of being surpassed or exceeded. rare.

(un-, prefix1 affix 1b.)

Without peer or equal; unsurpassed.

Unmatched, peerless. Obsolete.

Having no match, equal, or precedent; unparalleled. Obsolete (archaic in later use).

That is the only one of its kind; having no like or equal; unparalleled, unrivalled, esp. in… Without modification.

That cannot be paralleled, matched, or equalled.

Without a parallel; unparalleled.

Matchless, unequalled; incomparable. Cf. un-, prefix1 affix 10a.

Standing alone in comparison with other persons or things; unique, singular.

(un-, prefix1 affix 2.)

Unexampled. Obsolete.

(un-, prefix1 affix 2.)

Unparalleled.

Having no parallel or equal; = unparalleled, adj.

Unparalleled, unique. Obsolete. rare.

Unexampled, unprecedented. Obsolete.

(un-, prefix1 affix 1.)

(un-, prefix1 affix 1b.)

Unattainable; inaccessible.

Without a rival; unrivalled.

Not equalled in respect of excellence or high character; unexampled, unparalleled.

(un-, prefix1 affix 2.)

(un-, prefix1 affix 2.)

unexampled.

(un-, prefix1 affix 2.)

That cannot be rivalled.

Beyond the reach of rivalry; matchless.

(un-, prefix1 affix 2.)

That cannot be surpassed, ‘beaten’, or excelled; unsurpassable.

Not provided with a brother. Also figurative.

Not approached; not reached by advance (in space or attainment).

Incapable of being surpassed.

figurative. Unapproachable, unrivalled.

Not competing; hence, without a rival; unequalled.