Meaning : A musical notation that makes a note sharp or flat or natural although that is not part of the key signature.
Meaning : Happening by chance or unexpectedly or unintentionally.
Example :
With an inadvertent gesture she swept the vase off the table.
Accidental poisoning.
An accidental shooting.
Synonyms : inadvertent
Meaning : Not of prime or central importance.
Example :
Nonessential to the integral meanings of poetry.
The character's motives remain accidental to the plot.
Synonyms : incidental, nonessential
Accidental meaning in Bengali (Bangla).