1. (a.) Irregular; having no certain course\; roving about without a fixed destination; wandering; moving; -- hence, applied to the planets as distinguished from the fixed stars.

2. (a.) Deviating from a wise of the common course in opinion or conduct; eccentric; strange; queer; as, erratic conduct.

3. (a.) Irregular; changeable.

4. (n.) One who deviates from common and accepted opinions; one who is eccentric or preserve in his intellectual character.

5. (n.) A rogue.

6. (n.) Any stone or material that has been borne away from its original site by natural agencies; esp., a large block or fragment of rock; a bolder.

aberrant aberrative abnormal adrift afloat agnostic aimless alternating ambiguous amorphous anomalistic anomalous bizarre broken capricious careening casual catchy chancy changeable changeful changing character choppy circuitous crackpot crank crankish cranky crotchety curving departing desultory deviable deviant deviating deviative deviatory devious dicey different digressive directionless disarticulated disconnected discontinuous discursive disjunct disordered disorderly dispersed disproportionate divagatory divaricate divergent diversified diversiform dizzy dotty doubtful doubting dubious eccentric equivocal erose errant exceptional excursive extraordinary fast and loose fey fickle fitful flake flaky flickering flighty flitting fluctuant fluctuating formless freak freakish frivolous funny giddy gratuitous guttering halting haphazard herky-jerky hesitant hesitating heteroclite heteromorphic hit-or-miss idiocratic idiosyncratic iffy immethodical impetuous impulsive incalculable inchoate incoherent inconsistent inconstant indecisive indemonstrable indirect indiscriminate infirm intermittent intermitting irregular irresolute irresponsible jagged jerky kinky kook kooky labyrinthine lurching maggoty mazy meandering meaningless mercurial misshapen moody motley mutable nonconformist nonstandard nonsymmetrical nonsystematic nonuniform nut nutty odd oddball orderless out-of-the-way outlandish patchy peculiar planetary planless pluralistic polysemous promiscuous quaint queer quirky ragged rambling random recluse restless rough roundabout roving scatterbrained scrappy screwball screwy senseless serpentine shapeless shifting shifty shuffling singular skeptical snaky snatchy spasmatic spasmic spasmodic spastic spineless sporadic spotty staggering straggling straggly strange strange duck stray straying subnormal swerving systemless touch-and-go turning twisted twisting unaccountable unarranged uncertain unclassified unconfirmable uncontrolled unconventional unconvinced undependable undirected undisciplined undivinable unequable unequal uneven unfixed unforeseeable ungraded unjoined unmethodical unmetrical unnatural unordered unorganized unorthodox unpersuaded unpredictable unprovable unregular unreliable unrestrained unrhythmical unsettled unsorted unstable unstable as water unstaid unsteadfast unsteady unsure unsymmetrical unsystematic ununiform unusual unverifiable vacillating vagarious vagrant vague variable variegated variform various varying veering vicissitudinary