第十三 (dìshísān): thirteenth

Meanings

Tā zhù zài dì shísān céng.

He lives on the thirteenth floor.

Zhè shì dì shísān cì huìyì.

This is the thirteenth meeting.

grammar

第 + number creates ordinal numbers in Chinese. 第十三 = 'the thirteenth'. Works with any number: 第一 (first), 第二 (second), etc.

第 dì

十 shí

三 sān