Usage note
“定”可以用来表示决定或设定的意思。比如,你可以在做决定时说‘我定了明天去公园’。
dìng kě yǐ lái bǎo shí jué dì de huò qì dé sī yùn. rúbèi, nǐ kěyǐ zài zuò juédì de shíqián shuō ‘wǒ dìngle míngtiān qù gōngyuán’.
"定" can be used to express the meaning of deciding or setting. For example, you can say 'I decided to go to the park tomorrow' when making a decision.