on fire; ablaze intensely interested or passionate: she was afire with enthusiasm for the new plan
WordReference Random House Learner's Dictionary of American English © 2026
a•fire /əˈfaɪr/USA pronunciation
adj.
WordReference Random House Unabridged Dictionary of American English © 2026- on fire: [after a noun]to set a house afire.[be + ~]The house was afire.
- very eager and excited:[be + ~]was all afire with the thought of the trip.
a•fire
(ə fīər′),USA pronunciation adj.
- on fire:to set a house afire.
- aflame (def. 2).
- 1175–1225; Middle English; see a-1, fire
Collins Concise English Dictionary © HarperCollins Publishers::
'afire' also found in these entries (note: many are not synonyms or translations):