nounnounadjective

le vague

wave

C'est une grande masse d'eau qui se forme et se déplace à la surface de la mer ou de l'océan.

The word vague has two distinct meanings in French, depending on whether it is used as a noun or an adjective:

As a noun (feminine): It refers to a wave in a body of water (ocean, sea, or lake). It can also metaphorically describe a surge or a sudden increase in something, such as a "wave of emotion" or a "wave of protest."
As an adjective: It means vague, fuzzy, or indistinct. It describes something that lacks precise details, is poorly defined, or is not clearly expressed. It can also refer to a feeling or impression that is not concrete or specific.

Grammar:
- When used as a noun, it is a feminine noun (une vague).
- When used as an adjective, it agrees with the gender and number of the noun it modifies (e.g., des idées vagues).
Word origin:
- The noun vague comes from the Old French vague, derived from the Latin vagus, originally meaning "wandering" or "unsteady," which relates to the movement of water.
- The adjective vague also traces back to the Latin vagus, meaning "rambling," "uncertain," or "unsettled."