'accidentally' definitions:

Without advance planning; "they met accidentally" [syn: by chance, accidentally, circumstantially, unexpectedly] [ant: advisedly, by choice, by design, deliberately, designedly, intentionally, on purpose, purposely]

Of a minor or subordinate nature; "these magnificent achievements were only incidentally influenced by Oriental models" [syn: incidentally, accidentally]

Without intention; in an unintentional manner; "she hit him unintentionally" [syn: unintentionally, accidentally] [ant: advisedly, by choice, by design, deliberately, designedly, intentionally, on purpose, purposely]