1:1

Writing & Everyday abbreviation · Email and Office

1:1 stands for One-on-one (meeting), an email and office abbreviation.

Denotes a private, recurring meeting between two people, usually a manager and a direct report, to discuss progress, feedback and career goals. It appears in calendars, chat messages and management guides.

Example: Let's move our 1:1 to Thursday; I'm in workshops all day Tuesday.

Usage notes

Also written 1-on-1 or 1on1. Andy Grove's management classic High Output Management (1983) promoted regular one-on-ones as a core managerial tool. Common advice holds that the meeting belongs to the employee, who should set much of the agenda. In marketing, 1:1 can also describe individually personalized communication.

Related abbreviations

More email and office abbreviations

• ACK – Acknowledged
• AOB – Any other business
• ASAP – As soon as possible
• BCC – Blind carbon copy
• BLUF – Bottom line up front
• BR – Best regards
• CC – Carbon copy
• COB – Close of business
• COP – Close of play
• DL – Distribution list
• Encl. – Enclosure
• EOB – End of business

See all 60 email and office abbreviations →

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