amount necessary to fill a container (e.g. cupful, spoonful, etc.); drink (usu. alcoholic); full; one squid, octopus, crab, etc.; one boat; fully; to capacity
Examples (1 in total)
彼はちからいっぱい引っ張ったが、岩はびくともしなかった。
He pulled with all his strength, but the rock would not move.