Commit and Lock

• (v.t.) To give in trust; to put into charge or keeping; to intrust; to consign; -- used with to, unto.
• (v.t.) To confound.
• (v.i.) To sin; especially, to be incontinent.
• (v.t.) To put in charge of a jailor; to imprison.
• (v.t.) To join for a contest; to match; -- followed by with.
• (v.t.) To pledge or bind; to compromise, expose or endanger by some decisive act or preliminary step; -- often used reflexively; as, to commit one's self to a certain course.
• (v.t.) To do; to perpetrate, as a crime, sin or fault.

verb

• Perform an act, usually with a negative connotation.
  • usage: "perpetrate a crime"; "pull a bank robbery"
  • synonyms: perpetrate, pull
• Give entirely to a specific person, activity, or cause.
  • usage: "She committed herself to the work of God"; "give one's talents to a good cause"; "consecrate your life to the church"
  • synonyms: give, dedicate, consecrate, devote
• Cause to be admitted; of persons to an institution.
  • usage: "After the second episode, she had to be committed"; "he was committed to prison"
  • synonyms: institutionalize, institutionalise, send, charge
• Confer a trust upon.
  • usage: "The messenger was entrusted with the general's secret"; "I commit my soul to God"
  • synonyms: entrust, intrust, trust, confide
• Make an investment.
  • usage: "Put money into bonds"
  • synonyms: invest, put, place
• Engage in or perform.
  • usage: "practice safe sex"; "commit a random act of kindness"
  • synonyms: practice

(DoD) The process of committing one or more air interceptors or surface-to-air missiles for interception against a target track.

noun

• A fastener fitted to a door or drawer to keep it firmly closed.
• A strand or cluster of hair.
  • synonyms: curl, ringlet, whorl
• A mechanism that detonates the charge of a gun.
• Enclosure consisting of a section of canal that can be closed to control the water level; used to raise or lower vessels that pass through it.
  • synonyms: lock chamber
• A restraint incorporated into the ignition switch to prevent the use of a vehicle by persons who do not have the key.
  • synonyms: ignition lock
• Any wrestling hold in which some part of the opponent's body is twisted or pressured.

verb

• Fasten with a lock.
  • usage: "lock the bike to the fence"
• Keep engaged.
  • usage: "engaged the gears"
  • synonyms: engage, mesh, operate
• Become rigid or immoveable.
  • usage: "The therapist noticed that the patient's knees tended to lock in this exercise"
• Hold in a locking position.
  • usage: "He locked his hands around her neck"
  • synonyms: interlock, interlace
• Become engaged or intermeshed with one another.
  • usage: "They were locked in embrace"
  • synonyms: interlock
• Hold fast (in a certain state. )
  • usage: "He was locked in a laughing fit"
• Place in a place where something cannot be removed or someone cannot escape.
  • usage: "The parents locked her daughter up for the weekend"; "She locked her jewels in the safe"
  • synonyms: lock in, lock away, put away, shut up, shut away, lock up
• Pass by means through a lock in a waterway.
• Build locks in order to facilitate the navigation of vessels. .

• (n.) Anything that fastens; specifically, a fastening, as for a door, a lid, a trunk, a drawer, and the like, in which a bolt is moved by a key so as to hold or to release the thing fastened.
• (n.) A device for keeping a wheel from turning.
• (v.t.) To prevent ingress or access to or exit from, by fastening the lock or locks of; -- often with up; as, to lock or lock up, a house, jail, room, trunk. etc.
• (v.i.) To become fast, as by means of a lock or by interlacing; as, the door locks close.
• (n.) The barrier or works which confine the water of a stream or canal.
• (n.) A tuft of hair; a flock or small quantity of wool, hay or other like substance; a tress or ringlet of hair.
• (v.t.) To furnish with locks; also, to raise or lower (a boat) in a lock.
• (v.t.) To link together; to clasp closely; as, to lock arms.
• (v.t.) To seize, as the sword arm of an antagonist, by turning the left arm around it, to disarm him.
• (n.) An inclosure in a canal with gates at each end, used in raising or lowering boats as they pass from one level to another; -- called also lift lock.
• (n.) That part or apparatus of a firearm by which the charge is exploded; as, a matchlock, flintlock, percussion lock, etc.
• (v.t.) To fasten in or out or to make secure by means of or as with, locks; to confine or to shut in or out -- often with up; as, to lock one's self in a room; to lock up the prisoners; to lock up one's silver; to lock intruders out of the house; to lock money into a vault; to lock a child in one's arms; to lock a secret in one's breast.
• (n.) A grapple in wrestling.
• (v.t.) To fasten with a lock or as with a lock; to make fast; to prevent free movement of; as, to lock a door, a carriage wheel, a river, etc.
• (n.) A place from which egress is prevented, as by a lock.
• (n.) A fastening together or interlacing; a closing of one thing upon another; a state of being fixed or immovable.

Lock is used in the context of general equities. Make a market both ways (bid andoffer) either on the bid, offering, or an in-between price only. Locking on the offering occurs to attract a seller, since the trader is willing to pay (and ask) the offering side when others only ask it. Locking on the bid side attracts buyers for similar reasons. Typically, the sell side requires a plus tick to comply with short sale rules.