inlock noun 4verb 2forms 3 noun4 •A locking in.The lower jaw slides forward on account of the inlock of these upper teeth. — 1898 •That which is locked in. •An inner or interior lock. •(dialect, UK) Any corner or part of a common field plowed up and sowed with oats, etc. and sometimes fenced in with a dry hedge while the lave of the field lies fallow and common. verb2 •To lock in. •To enclose. formsinlocked · inlocking · inlocks