numeric
25; twenty-five
The number 25; used for counting, ages, quantities, etc.
今年で二十五歳になります。
I will be 25 years old this year.
クラスには二十五人の生徒がいます。
There are 25 students in the class.
numeric
1 a.m.
Only when written 25
Colloquial time expression using the 24+ hour system; 25時 means 1 a.m. the next day. Restricted to the 25 spelling.
昨夜は25時まで起きていた。
Last night I stayed up until 1 a.m.
Compound of 二 (ni, 'two'), 十 (jū, 'ten'), and 五 (go, 'five').