Pocket veto

Non-approval of a legislative act by the president or state governor, with the result that it fails to become a law, not by a written disapproval, (a veto in the ordinary form,) but by remaining silent until the adjournment of the legislative body, when that adjournment takes place before the expiration of the period allowed by the constifution for the examination of the bill by the executive.

Defined under Veto in Black's Law Dictionary.