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

• Lexulous
• Wordscraper
• Wordosaur

n. The amount that an arm or arms can hold.

n. The amount an arm or arms can hold.

n. As much as the arm can hold.

n. As much as the arms can hold; what one holds in one's arms or embrace.

n. the quantity that can be contained in the arms

"He worked methodically, even collecting an armful of the larger branches to be used later when the fire gathered strength."

containerful   

armload    assortment    bundle    clump    sheaf    handful    fistful    stack    pile    bouquet