Have its proper place, be accepted in a group, and be a part of a group.

(intransitive, followed by to) To be part of, or the property of.

(intransitive, followed by to) To be the spouse or partner of. (Can we add an example for this sense?)

(intransitive, set theory) (followed by to) To be an element of (a set). The symbol ∈ {\displaystyle \in } means belongs to.

(obsolete, transitive) To be deserved by.

(Australian Aboriginal, optionally followed by to) Of, belonging to.