Overarm Definition

ōvər-ärm
overarm
adjective
Executed with the arm raised above the shoulder; overhand.
An overarm throw.
American Heritage
Performed by raising the arm above the shoulder, as a swimming stroke.
Webster's New World
Synonyms:
Antonyms:
verb
To supply (a nation, for example) with an excess of weaponry, especially nuclear missiles.
American Heritage
adverb

Having the hand above the arm at the time of throwing.

In cricket, one must only bowl overarm.
Wiktionary