# sum

sum / səm/ •
n. 1. a particular amount of money: *they could not afford such a sum.*2. (the sum of) the total amount resulting from the addition of two or more numbers, amounts, or items: *the sum of two prime numbers.* ∎ the total amount of something that exists: *the sum of his own knowledge.*3. an arithmetical problem, esp. at an elementary level.•
v. (summed, sum·ming) [tr.] technical find the sum of (two or more amounts): *if we sum these equations we obtain x.* ∎ [intr.] (sum to) (of two or more amounts) add up to a specified total: *these additional probabilities must sum to 1.*PHRASES: in sum to sum up; in summary: *this interpretation does little, in sum, to add to our understanding.*PHRASAL VERBS: sum up give a brief summary of something: *Gerard will open the debate and I will sum up.* ∎ Law (of a judge) review the evidence at the end of a case, and direct the jury regarding points of law.sum someone/something up express a concise idea of the nature or character of a person or thing: *selfish—that summed her up.*

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