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Dom (noun) A title formerly borne by member of the high nobility of Portugal and Brazil 
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Sub (noun) A submarine. 
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Sub (noun) A submarine sandwich: a sandwich made on a long bun. “We can get subs at that deli.” 
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Sub (noun) A substitute, often in sports. “With the score 4 to 1, they brought in subs.” “She worked as a sub until she got her teaching certificate.” 
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Sub (noun) A subscription: a payment made for membership of a club, etc. 
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Sub (noun) A submissive in BDSM practices. 
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Sub (noun) A subtitle. “I’ve just noticed a mistake in the subs for this film.” 
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Sub (noun) A subroutine (sometimes one that does not return a value, as distinguished from a function, which does). 
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Sub (noun) A subeditor. 
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Sub (noun) A subcontractor. 
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Sub (noun) A subordinate. 
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Sub (noun) A subaltern. 
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Sub (verb) To substitute for. 
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Sub (verb) To work as a substitute teacher, especially in primary and secondary education. 
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Sub (verb) To replace (a player) with a substitute. “He never really made a contribution to the match, so it was no surprise when he was subbed at half time.” 
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Sub (verb) Less commonly, and often as sub on, to bring on (a player) as a substitute. “He was subbed on half way through the second half, and scored within minutes.” 
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Sub (verb) To perform the work of a subeditor or copy editor; to subedit. 
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Sub (verb) To lend. 
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Sub (verb) To subscribe. 
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Sub (verb) To take a submissive role. 
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Sub (verb) To coat with a layer of adhering material; to planarize by means of such a coating. 
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Sub (verb) To prepare (a slide) with an layer of transparent substance to support and/or fix the sample. 
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Sub (preposition) Under. 
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Sub (noun) a submarine “the yachtsman claimed his boat had been sunk by a sub” 
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Sub (noun) short for “submarine sandwich” 
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Sub (noun) a subscription “the annual sub for the golf club will be £200” 
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Sub (noun) a substitute, especially in a sporting team “the team pulled back with a goal from sub Chris Malkin” 
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Sub (noun) a subeditor “the chief sub would be responsible for the look of the paper” 
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Sub (noun) an advance or loan against expected income “‘I’ve got no money.’ ‘Want a sub?’” 
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Sub (verb) replace or be replaced; substitute “he subbed for Armstrong at some gigs” “he got a lot of applause when he was subbed” 
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Sub (verb) lend or advance a sum to (someone) against expected income “who’ll sub me till Thursday?” 
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Sub (verb) subedit “his copy was mercilessly subbed and rewritten” 
 
					