quidam

Quidam is a Latin term meaning "a certain person" or "someone." In Latin texts, quidam is used to refer to an unspecified individual, often translating to "a certain man" or "a certain thing" depending on context. In English, it appears in discussions of classical sources and philology.

Quidam may also refer to:

- Quidam (Cirque du Soleil): A touring Cirque du Soleil show that premiered in 1996 in Montreal. The production centers on a nameless girl named Quidam who enters a dreamlike world inhabited by a chorus of solitary characters. The show combines acrobatics, theatre and live music, and has toured worldwide with multiple casts.

- Quidam (band): A Polish progressive rock band formed in the late 1990s. Quidam is part of the neo-progressive movement and has released several albums that feature long-form compositions, melodic vocals, and keyboard-driven textures.