ERRATIC

adj. 1 irregular, unpredictable, inconsistent, unreliable, capricious, changeable, variable; wayward, unstable, aberrant, flighty The buses run on an erratic schedule 2 peculiar, abnormal, wayward, odd, eccentric, outlandish, strange, unusual, unorthodox, extraordinary, queer, quaint, bizarre, weird, unconventional He thinks that his erratic behaviour marks him as an individualist 3 wandering, meandering, directionless, planetary, aimless, haphazard, discursive, errant, divagatory Their course was erratic, following the loss of their compass