The long habit of living together in mutually dependent intimacy had given them the same vocabulary, and the same habit of beginning their phrases "Mother thinks" or "Janey thinks," according as one or the other wished to advance an opinion of her own; but in reality, while Mrs. Archer’s serene unimaginativeness rested easily in the accepted and familiar, Janey was subject to starts and aberrations of fancy welling up from springs of suppressed romance.
There are no more uses of "aberration" in the book.
Show samples from other sources
The outburst was an aberration, out of keeping with her character.
At that moment she cannot have been in her right mind; yet, what was the cause of her temporary aberration I cannot say.