English Reference
noun

monthly

n.
US /ˈmənθɫi/ UK /mˈʌnθli/ month·ly UK spelling monthlies

  1. 01 B1 Intermediate

    a magazine that comes out once every month.

    a periodical publication issued once a month.

    Simple

    She writes a regular column for a popular fashion monthly.

    In context

    While many dailies are struggling, this high-end monthly has maintained a loyal readership through its long-form investigative journalism.

  2. 02 C1 Advanced Informal Medicine

    a polite or indirect way to talk about a woman's period.

    a euphemistic reference to the menstrual cycle.

    Simple

    She was feeling quite tired because her monthly had just started.

    In context

    In many traditional households, women used coded language like 'my monthly' to discuss their health without causing social discomfort.

    Usage

    Usually used with a possessive pronoun like 'her' or 'my'.

    Teacher's tip

    This is a euphemism; while common in older or more modest contexts, modern speakers often use the word 'period' directly.

Second, we contacted the financial company where we owed our biggest monthly payment.

The Conversation· 19 Aug 2026

Track your spending weekly as well as monthly.

The Guardian· 19 Aug 2026

Etymology 1

From month + -ly (adjectival suffix), perhaps via Middle English monethly (attested only adverbially), from Old English mōnaþlīċ (“monthly”), from Proto-West Germanic mānōþlīk, from Proto-Germanic *mēnōþlīkaz (“monthly”). Cognate with Saterland Frisian moundelk (“monthly”), German monatlich (“monthly”), Danish månedlig (“monthly”), Swedish månatlig (“monthly”), Norwegian Bokmål månedlig (“monthly”), Icelandic mánaðarlegur (“monthly”).

Etymology 2

From Middle English monethly, equivalent to month + -ly (adverbial suffix). Cognate with Saterland Frisian moundelk (“monthly”), Dutch maandelijks (“monthly”), German monatlich (“monthly”), Swedish månatligen (“monthly”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin gem-pro *mēnōþlīkaz
Level B2 · Upper Intermediate
Frequency Common
Updated