一定
yídìng
surely; certainly; must
Every meaning
yīdìng
- surely; certainly; must
- fixed; specified
- certain; given (as in 一定的条件)
In a sentence
明天我一定来。
I'll definitely come tomorrow.
这个办法有一定的作用。
This method is effective to a certain extent.
Written by Claude and checked by our reader.
In the Library
坐在我旁边的同事小声告诉我：“在我们这儿，第一首歌一定是老板选。
在中国，商店一定要收现金，这是国家的规定。
他的朋友小周说：“来成都，一定要去茶馆。
一米长的茶壶 · At a Chinese tea house: the metre-long teapot · HSK 3
Its characters
Words with 一
Words with 定
Meanings are from Mandarin The Wild’s own dictionary. Levels follow the official HSK word list (the exam’s 2025 syllabus, levels 7–9 shown together).