1. determine the sum of;

- Example: "Add all the people in this town to those of the neighboring town"

[syn: total, tot, tot up, sum, sum up,

2. form or constitute a cumulative effect;

WordNet (r) 3.0 (2006):

summate v 1: determine the sum of; "Add all the people in this town to those of the neighboring town" [syn: total, tot, tot up, sum, sum up, summate, tote up, add, add together, tally, add up] 2: form or constitute a cumulative effect