filled, as by objects, organisms, etc., esp. in motion; teeming (usually used predicatively)
The garden was aswarm with bees
a night sky aswarm with stars
Word origin
[1880–85; a-1 + swarm1]This word is first recorded in the period 1880–85. Other words that entered Englishat around the same time include: barnstorm, interface, irredentist, rain check, regionalisma- is a reduced form of the Old English preposition on, meaning “on,” “in,” “into,” “to,” “toward,” preserved before a noun in a prepositionalphrase, forming a predicate adjective or an adverbial element (afoot; abed; ashore; aside; away), or before an adjective (afar; aloud; alow), as a moribund prefix with a verb (acknowledge), and in archaic and dialectal use before a present participle in -ing (set the bells aringing); and added to a verb stem with the force of a present participle (ablaze; agape; aglow; astride; and originally, awry)