accidentally Meaning, Definition & Usage

  1. adverb without advance planning
    circumstantially; unexpectedly; by chance.
    • they met accidentally
  2. adverb of a minor or subordinate nature
    incidentally.
    • these magnificent achievements were only incidentally influenced by Oriental models
  3. adverb without intention; in an unintentional manner
    unintentionally.
    • she hit him unintentionally

WordNet

Ac`ci*den"tal*ly adverb
Definitions
  1. In an accidental manner; unexpectedly; by chance; unintentionally; casually; fortuitously; not essentially.

Webster 1913