Definitions

1. interjection

an expression used to get someone’s attention or to show greeting or acknowledgement

“She shouted ‘Hey’ to her friend across the street.”

2. noun

a greeting or a call to attract someone’s attention

“The kids heard the sound of their friend’s ‘hey’ and ran towards her.”

3. verb

to attract someone’s attention or to call out to someone

“The teacher said ‘Hey’ to the student who was not paying attention.”

4. adverb

used to emphasize or modify another verb

“He’s always hey-ing people in the street to ask for money.”