1 a: to fasten the lock of b: to make fast with or as if with a lock <lock up the house> 2 a: to fasten in or out or to make secure or inaccessible by or as if by means of locks <locked himself away from the curious world>b: to fix in a particular situation or method of operation <a team firmly locked in last place> 3 a: to make fast, motionless, or inflexible especially by the interlacing or interlocking of parts <lock wheels><lock a knee>b: to hold in a close embrace c: to grapple in combat; also: to bind closely <administration and students were locked in conflict> 4: to invest (capital) without assurance of easy convertibility into money 5: to move or permit to pass (as a ship) by raising or lowering in a lockintransitive verb1 a: to become locked b: to be capable of being locked 2:interlace, interlock 3: to go or pass by means of a lock (as in a canal)
— lock·able\ˈlä-kə-bəl\adjective
— lock horns: to come into conflict
— lock on or lock onto: to acquire (as a target or signal) automatically using a sensor (as radar)