What does 有る mean in Japanese?

to be, to exist, to live, to have, to be located, to be equipped with

有る (Aru) — to be · Japanese Dictionary

ある

Aru

Usually written in kana.

Other forms: 在る

有る (Aru) is a Japanese godan verb meaning “to be, to exist, to live, to have”.

godan verb, intransitive verbto be; to exist; to liveusu. of inanimate objects
godan verb, intransitive verbto have
godan verb, intransitive verbto be located
godan verb, intransitive verbto be equipped with
godan verb, intransitive verbto happen; to come about
auxiliary verb, godan verbto exist (in a completed state); to be (something unchanged in its current state)after the ～て form of a transitive verb

誰にでも長所と短所がある。
Everyone has both strong and weak points.
最近、以前からある痔が痛みます。
Recently my haemorrhoids, which I've had from before, are painful.
話を聞いたのだから興味がある筈だ。
He listened to my pitch, so he must be interested.

Sentences from Tatoeba (CC BY 2.0 FR).