This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Having been delayed; done or sent too late: a belated birthday card.

adj. Later in relation to the proper time something should have happened.

v. Simple past tense and past participle of belate.

adj. Delayed beyond the usual time; too late; overtaken by night; benighted.

Coming or staying too late; overtaken by lateness, especially at night; benighted; delayed.

adj. after the expected or usual time; delayed

"There is doubt, though, about a medal Cotta received nearly three years ago in belated recognition of his heroism, the Distinguished"

unpunctual   

benighted    delayed    tardy    late   

abated    annotated    awaited    baited    bated    berated    conjugated    created    dated    debated   

heartfelt    tardy    instinctive    hasty    reluctant    unexpected    hearty    solitary    feeble    humble