| (used to imply that either or both of the things mentioned may be affected or involved): insurance covering fire and/or wind damage. |
and/or (ān'dôr') conj. Used to indicate that either or both of the items connected by it are involved. Usage Note: And/or is widely used in legal and business writing. Its use in general writing to mean "one or the other or both" is acceptable but can appear stilted. See Usage Note at or1. |
and/or
Both or either of two options. For example, His use of copyrighted material shows that the writer is careless and/or dishonest. This idiom originated in legal terminology of the mid-1800s.