课
kè
In real, traceable use. Part of the curated seed collection; community review is coming.
Traditional: 課
A lesson: one period of teaching, or one unit of a textbook. 第三课 is 'Lesson Three' in a book, and a subject's class takes the subject's name: 英语课 'English class'. 上课 and 下课 are the start and the end of class.
Tiết học, giờ học; cũng là một bài trong sách. 第三课 là “bài ba”, giờ của môn nào thì gắn tên môn đó: 英语课 (giờ tiếng Anh). 上课 và 下课 là vào học và tan học.
NounRegister: neutral
Examples
Editorial example (illustrative, not a corpus attestation) — awaiting a native-speaker check
Sources & notes
Hán-Việt bridge batch 064 (2026-11-14). Headword, Traditional form and pinyin checked against CC-CEDICT (CC BY-SA 4.0) source ↗ · Hán-Việt reading: Unihan kVietnamese source ↗ · No Vietnamese entry is linked as its twin; the Hán-Việt reading is given character by character. Definition, literal gloss and example sentence are original; the example has not had a native-speaker check yet.
Common questions
What does “课” mean?
A lesson: one period of teaching, or one unit of a textbook. 第三课 is 'Lesson Three' in a book, and a subject's class takes the subject's name: 英语课 'English class'. 上课 and 下课 are the start and the end of class.
Is “课” formal or informal?
课 is generally neutral.