1. Godan verb with 'ru' ending, Intransitive verb

   to be decided; to be settled; to be fixed; to be arranged

   いつ始めるのかはまだ決まっていない。

2. to be unchanging; to be the same (as always); to be fixed; to be set

   as 決まっている or 決まった

3. to be a fixed rule; to be destined; to be a convention; to be a custom; to be common knowledge

   as ...と決まっている

4. to be well executed (of a manoeuvre in a sport, game, etc.); to go well; to succeed; to connect (of a punch)

5. to look good (of clothing); to look sharp; to be stylish; to suit one; to be held in place (of a hairdo)

6. to be struck and held (of a pose in kabuki)

7. to get high (on drugs)

   SlangUsually written using kana aloneusu. written as キマる

Also written 決る【きまる】kimaru、極る【きまる】kimaru