To release or let go; to permit (someone or something) to roam freely or to act freely.(verb)
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Use "turn loose" in a sentence
"He refuses to consider an exchange for the king, says he's no fair match for a monarch, and to balance it fitly we must turn loose all the rearguard that were taken with him, to make up Stephen's weight in the scale."
"I didn't want to turn loose of my two-wing force, but the needle refused to stop its methodical up and down, up and down."
""Once they've got us keeping our heads down, they turn loose whatever they've got in the way of infantry-and then it gets nasty.""