ENGLISH
REFERENCE

mon

n. C / U
A1 Beginner US //ˈmɑn// mon Archaic Informal Slang

n. the second day of the week, coming after Sunday and before Tuesday. It is the day most people start their work or school week.

n. the day of the week following Sunday and preceding Tuesday. When used to refer to the day in general, it is often capitalized; in informal digital contexts, it is frequently abbreviated.


SIMPLE

I always feel tired on Mon morning.

CONTEXTUAL

The office is usually quiet on Mon because many employees work from home at the start of the week.

COMPLEX

While the calendar technically begins on Sunday in some regions, Mon serves as the functional commencement of the commercial and academic week globally.

Synonyms
Origin

From Burmese မွန် (mwan).

Usage

Commonly used as an abbreviation for Monday in informal writing, schedules, and calendars.

Pitfall

I will see you in MonI will see you on MonDays of the week require the preposition 'on' rather than 'in'.

© 2026 English Reference