sum up in WordNet English dictionary

1. determine the sum of
   "Add all the people in this town to those of the neighboring town"
   total  tot  tot up  sum  sum up  summate  tote up  add  add together  tally  add up 
   
2. give a summary (of)
   "he summed up his results"; "I will now summarize"
   sum up  summarize  summarise  resume 
   
3. be a summary of
   "The abstract summarizes the main ideas in the paper"
   summarize  summarise  sum  sum up 
   

sum up in English Wiktionary