Definitions of accidental

1. a musical notation that makes a note sharp or flat or natural although that is not part of the key signature

2. A property which is not essential; a nonessential; anything happening accidentally.

3. A sharp, flat, or natural, occurring not at the commencement of a piece of music as the signature, but before a particular note.

4. That which happens unexpectedly; a sign used in music to lower or raise the note before which it is placed.

5. Anything not essential.

6. A property or quality nonessential; anything accidental.

7. Anything non- essential.

8. Accidentally.

9. associated by chance and not an integral part; " poetry is something to which words are the accidental, not by any means the essential form"- Frederick W. Robertson; " they had to decide whether his misconduct was adventitious or the result of a flaw in his character"

10. Happening by chance, or unexpectedly; taking place not according to the usual course of things; casual; fortuitous; as, an accidental visit.

11. Nonessential; not necessary belonging; incidental; as, are accidental to a play.

12. Happening by chance; casual.

13. Happening by chance or unexpectedly; casual; connected with, but not necessarily belonging to; incidental.

14. Happening by chance: not essential.

15. Happening by chance; casual; non- essential; incidental.

16. Happening by chance, or unexpectedly; non- essential; not necessarily belonging to. Accidental colours those complementary colours seen on a white or light ground after looking steadily for some time at a bright coloured object.