-rd

Suffix

morpheme

Marks ordinals written in digits when the final term of the spelled number is "third"

Japanese Meaning

数字の序数（例：3rd）の表記において、書かれた数字の最後が「third」となる場合に付加される接尾辞。

When writing ordinals numerically, add -rd to any number whose spelled form ends with 'third'.

序数を数字で表すとき、つづりが「三番目」で終わる語には「三番目」を示す接尾辞を付けます。

Sense（1）

Marks ordinals written in digits when the final term of the spelled number is "third"

We're on 23rd Street.