to stop using or wearing: It had stopped raining, so we left off our coats.
c.
to omit: to leave a name off a list.
18.
leave out, to omit; exclude: She left out an important detail in her account.
Origin: bef. 900; ME leven, OE lǣfan (causative formation from base of lāf remainder; see lave2); c. OHG leiban (cf. G bleiben to remain), ON leifa, Goth -laibjan
Usage note: Leave is interchangeable with let when followed by alone with the sense “to refrain from annoying or interfering with”: Leave (or Let) her alone and she will solve the problem easily. When he was left (or let) alone without interruptions, the boy quickly assembled the apparatus. The use of leave alone for let alone in the sense “not to mention” is nonstandard: There wasn't any standing room, let (not leave) alone a seat, so I missed the performance. Other substitutions of leave for let are generally regarded as nonstandard: Let (not Leave) us sit down and talk this over. Let (not Leave) her do it her own way. The police wouldn't let (not leave) us cross the barriers.See also let1.
To go out of or away from: not allowed to leave the room.
To go without taking or removing: left my book on the bus.
To omit or exclude: left out the funniest part of the story.
To have remaining after death: left a young son.
To bequeath: left her money to charity.
To abandon or forsake: leave home; left her husband.
To remove oneself from association with or participation in: left the navy for civilian life.
To give or deposit, as for use or information, upon one's departure or in one's absence: He left a note for you. Leave your name and address.
To cause or permit to be or remain: left myself plenty of time.
To have as a result, consequence, or remainder: The car left a trail of exhaust fumes. Two from eight leaves six.
To cause or allow to be or remain in a specified state: left the lights on.
To have remaining after death: left a young son.
To bequeath: left her money to charity.
To abandon or forsake: leave home; left her husband.
To remove oneself from association with or participation in: left the navy for civilian life.
To give or deposit, as for use or information, upon one's departure or in one's absence: He left a note for you. Leave your name and address.
To cause or permit to be or remain: left myself plenty of time.
To give over to another to control or act on: Leave all the details to us.
To abandon or forsake: leave home; left her husband.
To remove oneself from association with or participation in: left the navy for civilian life.
To give or deposit, as for use or information, upon one's departure or in one's absence: He left a note for you. Leave your name and address.
To cause or permit to be or remain: left myself plenty of time.
To give or deposit, as for use or information, upon one's departure or in one's absence: He left a note for you. Leave your name and address.
To cause or permit to be or remain: left myself plenty of time.
Nonstandard To allow or permit; let.
v.
intr.
To set out or depart; go: When can you leave?
Phrasal Verbs:
leave /letalone
To refrain from disturbing or interfering.
leave off
To stop; cease.
To stop doing or using.
Phrasal Verb(s): leave /let aloneTo refrain from disturbing or interfering. leave off
To stop; cease.
To stop doing or using.
Idiom(s):
leave no stone unturnedTo make every possible effort.
[Middle English leaven, from Old English lǣfan; see leip- in Indo-European roots.] leav'er n.
Usage Note: Leave alone is an acceptable substitute for let alone in the sense "to refrain from disturbing or interfering." A majority of the Usage Panel in an earlier survey approved the following examples: Leave him alone and he will produce. Left alone, he was quite productive. Those who did not accept these examples generally felt that leave alone should mean simply "to depart from someone who remains in solitude": They were left alone in the wilderness. · In formal writing leave is not an acceptable substitute for let in the sense "to allow or permit." Thus in the following examples, only let can be used: Let me be. Let him go. Let us not quarrel. Let it lie.
Stop, cease; also, stop doing or using. For example, Mother told the children to leave off running around the house, or Please use a bookmark to show where you left off reading. [c. 1400]
leave something off. Omit, as in We found she had left off our names.
[leev] 
verb, left, leav⋅ing.