Belong Definition

bĭ-lông, -lŏng

belonged, belonging, belongs

verb

belonged, belonging, belongs

To be proper, appropriate, or suitable.

A napkin belongs at every place setting.

American Heritage

To have a proper or suitable place.

The chair belongs in the corner; she belongs in the movies.

Webster's New World

To be in an appropriate situation or environment.

That plant belongs outdoors.

American Heritage

To be part of; be related or connected (to)

Webster's New World

To be a member of a group, such as a club.

American Heritage

Synonyms:

Antonyms:

preposition

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

Wiktionary

Origin of Belong

From Middle English belongen, from be- +‎ longen (“to belong”), from Old English langian (“to pertain to, suit”). Compare Dutch belangen (“to concern”), German belangen (“to attain, concern”). More at be-, long.

From Wiktionary
Middle English bilongen probably bi- be- longen to belong (probably from long dependent) (from Old English gelang along, depending del-¹ in Indo-European roots)

From American Heritage Dictionary of the English Language, 5th Edition
Compare Kriol blanga, Bislama blong, Tok Pisin bilong, and Torres Strait Creole blong.

From Wiktionary