Black's Law Dictionary (2nd edition)dictionaries

Pocket

This word is used as au adjective in several compound legal phrases, carrying a meaning suggestive of, or aualogous to, its signification as a pouch, bag, or secret receptacle. For these phrases, see “Bor-ough,” “Judgment,” “Record,” “Sheriff,” and “Veto.”

Source: Black's Law Dictionary 2nd Ed (1910)