'unbalance' definitions:

Definition of 'unbalance'

From: WordNet
noun
A lack of balance or state of disequilibrium; "a hormonal imbalance" [syn: imbalance, instability, unbalance] [ant: balance]
noun
A state of mental disturbance and disorientation [syn: derangement, mental unsoundness, unbalance]
verb
Throw out of balance or equilibrium; "The tax relief unbalanced the budget"; "The prima donna unbalances the smooth work in our department" [ant: balance, equilibrate, equilibrise, equilibrize]
verb
Derange mentally, throw out of mental balance; make insane; "The death of his parents unbalanced him" [syn: unbalance, derange]

Synonyms of 'unbalance'

From: Moby Thesaurus