Definitionen
1.InterjectionUsed to call animals.
2.InterjectionUsed to request silence.
3.InterjectionUsed to imply that the speaker is sending secret or whispered information to another person."Psst, John, don’t tell anyone, but I’ve got lots of candy stashed away."
4.InterjectionImitating a spray.
5.VerbTo say psst, to get someone's attention or to communicate with them.