'Zǒu le' literally combines the verb 'zǒu' (to go, to leave) with the aspect particle 'le', which marks a completed action or a change of state. Together, it expresses that someone has just departed or is in the process of leaving — often used as a polite, casual farewell, equivalent to 'I’m off' or 'I’m leaving now.' It’s not a noun but a verbal phrase indicating completion of departure.

This expression is commonly used at the end of conversations, when exiting a room or ending a social visit. Tone and context matter: it’s neutral-to-polite, rarely formal, and usually implies the speaker is the one leaving. It can also appear mid-sentence ('He just left' → 'Tā zǒu le'), but as a standalone utterance, it functions like a pragmatic farewell marker rather than a descriptive statement.