Etymology: Middle English, against, from, with, from Old English; akin to Old English wither against, Old High German widar against, back, Sanskrit vi apart
Date: before 12th century
1 a: in opposition to :against<had a fight with his brother>b: so as to be separated or detached from <broke with her family> 2 a —used as a function word to indicate a participant in an action, transaction, or arrangement <works with his father><a talk with a friend><got into an accident with the car>b —used as a function word to indicate the object of attention, behavior, or feeling <get tough with him><angry with her>c: in respect to : so far as concerns <on friendly terms with all nations>d —used to indicate the object of an adverbial expression of imperative force <off with his head>e:over, on<no longer has any influence with them>f: in the performance, operation, or use of <the trouble with this machine> 3 a —used as a function word to indicate the object of a statement of comparison or equality <a dress identical with her hostess's>b —used as a function word to express agreement or sympathy <must conclude, with you, that the painting is a forgery>c: on the side of :for<if he's for lower taxes, I'm with him>d: as well as <can pitch with the best of them> 4 a —used as a function word to indicate combination, accompaniment, presence, or addition <heat milk with honey><went there with her><his money, with his wife's, comes to a million>b: inclusive of <costs $5 with the tax> 5 a: in the judgment or estimation of <stood well with her classmates>b: in or according to the experience or practice of <with many of us, our ideas seem to fall by the wayside — W. J. Reilly> 6 a —used as a function word to indicate the means, cause, agent, or instrumentality <hit him with a rock><pale with anger><threatened with tuberculosis><he amused the crowd with his antics>barchaic: by the direct act of 7 a —used as a function word to indicate manner of action <ran with effort><acknowledge your contribution with thanks>b —used as a function word to indicate an attendant fact or circumstance <stood there with his hat on>c —used as a function word to indicate a result attendant on a specified action <got off with a light sentence> 8 a (1): in possession of :having<came with good news>(2): in the possession or care of <left the money with her mother>b: characterized or distinguished by <a person with a sharp nose> 9 a —used as a function word to indicate a close association in time <with the outbreak of war they went home><mellows with time>b: in proportion to <the pressure varies with the depth> 10 a: in spite of :notwithstanding<a really tip-top man, with all his wrongheadedness — H. J. Laski>b: except for <finds that, with one group of omissions and one important addition, they reflect that curriculum — Gilbert Highet> 11: in the direction of <with the wind><with the grain>