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1. To not put something away in its proper place. A noun or pronoun can be used between "leave" and "out." Don't leave your dirty clothes out in the middle of the living room! Aw man, I accidentally left out the ice cream—now it's all melted.
2. To withhold or omit something. A noun or pronoun can be used between "leave" and "out." Your paper is nicely written, but you left your references out. I did talk to Mom, I just left out the part about getting detention.
3. To ignore, forget, or exclude, as from a group, activity, benefit, etc. In this usage, the phrase is usually used in the past tense ("left out"). A noun or pronoun can be used between "leave" and "out." Of course I felt left out when you guys went to the concert without me! You know it hurts your brother's feelings when you leave him out of things.
Omit, fail to include, as in This sentence doesn't make sense; a key word has been left out. [Late 1400s]
leave it outstop it. British informal
ˌleave it ˈout(British English, spoken) used to tell somebody to stop doing something: Leave it out, will you? I’m trying to study!
1. To allow something or someone to remain outdoors: I left the dog out last night.
2. To allow something to remain in plain sight: Who left the dirty dishes out on the kitchen counter?
3. To fail to include or mention something; omit something: We weren't sure if the facts were correct, so we left that section out of the report. You've left out the decimal point on this price tag.