mona
n. countablen. a short, informal way to say 'Monday'. You use it in texts or casual chats.
n. a colloquial abbreviation for Monday, typically used in informal written communication.
I have a big meeting on mona.
She sent a quick text saying she would be late on mona.
The weekly newsletter arrives every mona, setting the tone for the work week ahead.
Anglicized from Irish and Scottish Gaelic Muadhnait, from Middle Irish múad (“noble”). In northern Europe, where the name is much more popular, Mona is interpreted as a diminutive of Monica or, rarely, of Ramona, and sometimes associated with the title of da Vinci's painting Mona (=madonna) Lisa. The Arabic and Persian name مُنىٰ (munā) is sometimes Romanised as Mona.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Last updated May 5, 2026