(pos:副詞)
<explanation>
yue:發生嘅機會係100%
eng:certainly; surely; necessarily
<eg>
yue:而家唔出發一定遲到。 (ji4 gaa1 m4 ceot1 faat3 jat1 ding6 ci4 dou3.)
eng:If we are not leaving now, we will surely be late.
----
<explanation>
yue:表示絕對，加強句子入面嘅語氣，常用嘅有渴望、命令等等
eng:to imply certainty to enhance the imperative mood of the sentence
<eg>
yue:你一定要做功課。 (nei5 jat1 ding6 jiu3 zou6 gung1 fo3.)
eng:You must complete your homework.
<eg>
yue:我哋一定要贏。 (ngo5 dei6 jat1 ding6 jiu3 jeng4.)
eng:We must win.
<eg>
yue:你一定唔可以死。 (nei5 jat1 ding6 m4 ho2 ji5 sei2.)
eng:You must not die.

(pos:區別詞)
<explanation>
yue:#相當 嘅，係一個空泛嘅講法，通常會同「水準」、「水平」、「表現」一齊用
eng:substantial; a certain (level); non-trivial
<eg>
yue:達到一定水平 (daat6 zi3 jat1 ding6 seoi2 ping4)
eng:to reach a fairly high level
<eg>
yue:給予一定嘅重視 (kap1 jyu5 jat1 ding6 ge3 zung6 si6)
eng:to attach due importance to
<eg>
yue:雖然受咗傷，佢都發揮到一定嘅水準。 (seoi1 jin4 sau6 zo2 soeng1, keoi5 dou1 faat3 fai1 dou2 jat1 ding6 ge3 seoi2 zeon2.)
eng:Although he is injured, he performs at a reasonable level.