and/or

American  

[and-awr] / ˈændˈɔr /

conjunction

1. (used to imply that either or both of the things mentioned may be affected or involved).

   insurance covering fire and/or wind damage.

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and/or British  

conjunction

1. (coordinating) used to join terms when either one or the other or both is indicated

   passports and/or other means of identification

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and/or Idioms  

1. 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.

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Usage

The combination and/or is used primarily in business and legal writing: All dwellings and/or other structures on the property are included in the contract. Because of these business and legal associations, some object to the use of this combination in general writing, where it occasionally occurs: She spends much of her leisure time entertaining and/or traveling. In such writing, either and or or is usually adequate. If a greater distinction is needed, another phrasing is available: Would you like cream or sugar, or both?

Many people think that and/or is only acceptable in legal and commercial contexts. In other contexts, it is better to use or both: some alcoholics lose their jobs or their driving licences or both (not their jobs and/or their driving licences )

Example Sentences

Death crosses are more acknowledgments that the trend has extended long enough and/or fallen far enough to be taken seriously, and aren’t necessarily meant to be good market-timing signals.

From MarketWatch

This problem is particularly prevalent when patients are elderly, homeless, and/or struggling with mental health conditions—all situations applying disproportionately to veterans.

From Slate

Fifa rules state "if any participating member association withdraws and/or is excluded" from the 2026 tournament, world football's governing body "shall decide on the matter at its sole discretion and take whatever action is deemed necessary".

From BBC

This can help circumvent blackout restrictions commonly imposed by sports leagues and/or broadcasters, which limit access based on geographic location.

From Salon

As characters, they may be flamboyant and/or ironic in a way often denied to the central investigators, whom they are likely to find a little irritating.

From Los Angeles Times