numeric
thirteen; 13
The ordinary cardinal number 13. Used before counters as in 十三人, 十三歳, and 十三個.
参加者は全部で十三人だった。
There were thirteen participants in all.
妹は今年で十三歳になります。
My younger sister will turn thirteen this year.
noun
king; rank 13 in cards
Card-game use: rank thirteen corresponds to a king. This does not mean a monarch in ordinary language; キング or 王 is used for that.
このカードゲームでは、十三はキングとして扱う。
In this card game, thirteen is treated as a king.
Compound numeral from 十 meaning ten and 三 meaning three; together they conventionally represent 10 + 3, thirteen.