天
tiān
In real, traceable use. Part of the curated seed collection; community review is coming.
A day, counted straight after a number; also the sky. 三天 is 'three days', with no measure word. It ends many time words: 今天 'today', 明天 'tomorrow', 昨天 'yesterday'. As 'sky' it appears in 天上 'in the sky' and 天气 'weather'.
Ngày, đếm thẳng sau số mà không cần lượng từ; cũng có nghĩa là trời. 三天 là “ba ngày”. Chữ này có trong nhiều từ chỉ thời gian: 今天 (hôm nay), 明天 (ngày mai), 昨天 (hôm qua); nghĩa “trời” có trong 天上 (trên trời), 天气 (thời tiết).
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 “天” mean?
A day, counted straight after a number; also the sky. 三天 is 'three days', with no measure word. It ends many time words: 今天 'today', 明天 'tomorrow', 昨天 'yesterday'. As 'sky' it appears in 天上 'in the sky' and 天气 'weather'.
Is “天” formal or informal?
天 is generally neutral.