whistle - noun

the sound made by something moving rapidly or by steam coming out of a small aperture

the act of signalling (e.g., summoning) by whistling or blowing a whistle

a small wind instrument that produces a whistling sound by blowing into it

acoustic device that forces air or steam against an edge or into a cavity and so produces a loud shrill sound

an inexpensive fipple flute

whistle - verb

• make whistling sounds
• move with, or as with, a whistling sound
• utter or express by whistling
• move, send, or bring as if by whistling
• make a whining, ringing, or whistling sound
• give a signal by whistling

whistle - thesaurus

pennywhistle   sing   whistling