1. A quantity of money
   "he borrowed a large sum";
   - sum of money, amount, amount of money
    
2. A quantity obtained by the addition of a group of numbers
   "The sum of their ages was over 200 years";
   - amount, total
    
3. The complete amount or number when all parts are combined
   "The sum of his debts exceeded his assets";
   - total, totality, aggregate
    
4. The final amount obtained by adding everything together
   "the sum of all our troubles did not equal the misery they suffered";
   - summation, sum total
    
5. The choicest or most essential or most vital part of some idea or experience
   "the sum of the prosecutor's argument";
   - kernel, substance, core, center [US], centre [Brit, Cdn], essence, gist, heart, heart and soul, inwardness, marrow, meat, nub, pith, nitty-gritty [informal]
    
6. A set containing all and only the members of two or more given sets
   "let C be the sum of the sets A and B";
   - union, join

1. Determine the sum of
   "You need to sum all the items on the receipt";
   - total, tot [Brit, informal], tot up [Brit, informal], sum up, summate [rare], add, add together, tally, add up
    
2. Be a summary of
   "The abstract sums up the main ideas in the paper";
   - summarize, summarise [Brit], sum up

Sounds like: soles, souls

Derived forms: summed, sums, summing

Type of: accumulation, aggregation, assemblage, assets, cognitive content, collection, content, count, enumerate, mental object, number, numerate, quantity, say, set, state, tell, unit, whole

Encyclopedia: Sum