Emily Dickinson Lexicon

ER-RAT'IC, or ER-RAT'IC-AL, a. [L. erraticus, from erro, to wander.]

1. Wandering; having no certain course; roving about without a fixed destination. Pope.
2. Moving; not fixed or stationary; applied to the planets, as distinguished from the fixed stars.
3. Irregular; mutable. Harvey.