📒 a small metal or plastic tube that you blow to make a loud, high sound, used to attract attention or as a signal
📒 the sound made by blowing a whistle
📒 the sound that you make by forcing your breath out when your lips are almost closed
📒 the loud, high sound produced by air or steam being forced through a small opening, or by something moving quickly through the air
📒 a piece of equipment that makes a loud, high sound when air or steam is forced through it
📒 very clean
📒 to tell somebody in authority about something wrong or illegal that somebody is doing