1. (noun)divide a serious disagreement between two groups of people (typically producing tension or hostility)
2. (noun)watershed, water parting, divide a ridge of land that separates two adjacent river systems
3. (verb)divide, split, split up, separate, dissever, carve up separate into parts or portions
"divide the cake into three equal parts"; "The British carved up the Ottoman Empire after World War I"
4. (verb)divide, fraction perform a division "Can you divide 49 by seven?"
5. (verb)separate, divide act as a barrier between; stand between
"The mountain range divides the two countries"
6. (verb)separate, divide, part come apart
"The two pieces that we had glued separated"