Hey Definition

hā

interjection

Used to attract attention, to express surprise, delight, puzzlement, etc., or to preface a remark.

Webster's New World

Hello.

Webster's New World

Used to express greeting.

American Heritage

Hey, look at this!

Wiktionary

Hey! Stop that!

Wiktionary

Synonyms:

noun

(country dancing) A choreographic figure in which the dancers weave between one another.

Wiktionary

Other Word Forms of Hey

Singular:

hey

Plural:

heys

From Middle English hey, hei, also without h- in ey, from Old English *hē, ēa (interjection), attested as first element in Old English hēlā, ēalā (“O!, alas!, oh!, lo!”). Cognate with Dutch he, hei (“hi, hey”), German hei (“hey, wow”), Danish and Swedish hej (“hello, hey”), Faroese hey (“hey, hello”), Icelandic hei (“hey”), see heigh. Probably a natural expression, as may be inferred from its presence with similar meaning in many other unrelated languages: for example, Burmese ဟေး (hei), Finnish hei, Unami hè, and Mandarin Chinese 哎 (āi), and various sound-alikes as Roman eho, Greek εἴα (eia), Latin eia, Sanskrit हे (he). See also hello.

From Wiktionary
Middle English hei

From American Heritage Dictionary of the English Language, 5th Edition