1. (noun)imbalance, instability, unbalance a lack of balance or state of disequilibrium
"a hormonal imbalance"
2. (noun)derangement, mental unsoundness, unbalance a state of mental disturbance and disorientation
3. (verb)unbalance throw out of balance or equilibrium
"The tax relief unbalanced the budget"; "The prima donna unbalances the smooth work in our department"
4. (verb)unbalance, derange derange mentally, throw out of mental balance; make insane
"The death of his parents unbalanced him"