Unbalanced \Un*bal"anced\, a. [In senses 1 and 2, pref. un- not + balanced; in sense 3, 1st pref. un- + balance.]

1. Not balanced; not in equipoise; having no counterpoise, or having insufficient counterpoise. [1913 Webster]

Let Earth unbalanced from her orbit fly. --Pope. [1913 Webster]

2. (Com.) Not adjusted; not settled; not brought to an equality of debt and credit; as, an unbalanced account; unbalanced books. [1913 Webster]

3. Being, or being thrown, out of equilibrium; hence, disordered or deranged in sense; unsteady; unsound; as, an unbalanced mind. --Pope. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

96 Moby Thesaurus words for "unbalanced": abnormal, asymmetric, asymmetrical, batty, bereft of reason, bonkers, brainsick, canted, certifiable, crackbrained, cracked, crazed, crazy, daffy, daft, deluded, demented, deprived of reason, deranged, disoriented, disproportionate, distraught, disturbed, dizzy, eccentric, flighty, hallucinated, heeling, ill-balanced, illegal, inequitable, iniquitous, insane, irrational, irregular, leaning, listing, loco, lopsided, lunatic, mad, maddened, manic, mazed, mental, mentally deficient, meshuggah, moon-struck, non compos, non compos mentis, nonsymmetrical, not all there, not right, nuts, odd, of unsound mind, off, off-balance, off-center, overbalanced, psycho, queer, reasonless, senseless, shaky, sick, stark-mad, stark-staring mad, strange, tetched, top-heavy, touched, uncentered, undeserved, undue, unequal, unequitable, uneven, unhinged, unjust, unlawful, unmeet, unmerited, unrightful, unsane, unsettled, unsound, unstable, unsteady, unsymmetrical, wacky, wandering, witless, wobbly, wrong, wrongful

Source: Moby Thesaurus II by Grady Ward, 1.0
 

unbalanced adj
1: being or thrown out of equilibrium [syn: imbalanced] [ant: balanced]
2: affected with madness or insanity; "a man who had gone mad" [syn: brainsick, crazy, demented, distracted, disturbed, mad, sick, unhinged]
3: debits and credits are not equal

Source: WordNet (r) 2.0
 

Unbalanced \Un*bal"anced\, a. [In senses 1 and 2, pref. un- not + balanced; in sense 3, 1st pref. un- + balance.]

1. Not balanced; not in equipoise; having no counterpoise, or having insufficient counterpoise.

Let Earth unbalanced from her orbit fly. --Pope.

2. (Com.) Not adjusted; not settled; not brought to an equality of debt and credit; as, an unbalanced account; unbalanced books.

3. Being, or being thrown, out of equilibrium; hence, disordered or deranged in sense; unsteady; unsound; as, an unbalanced mind. --Pope.

Source: Webster's Revised Unabridged Dictionary (1913)