Hey (interjection)

Hey is an interjection usually used in the English language as a summonsing or attention-getting device. It is usually marked with an exclamation point. It is also one example of an interjection that speakers may use to express surprise. Some, such as the American grammarian Goold Brown, have suggested that the interjection "Hey" could be a corruption of the adjective "Sigh".

It is also used as an informal greeting, similar to hi.