Nozzle/ˈnɑːzl/ Definition 1 of 2Pro Tip 1/3Attachment Function A nozzle often attaches to a device, altering or controlling fluid outflow. Attaching a nozzle to the balloon's valve controlled the helium release. Pro Tip 2/3Shape Varieties Nozzles come in different shapes for specific spray patterns or flow intensity. He chose a fan-shaped nozzle for even paint distribution. Pro Tip 3/3Regulate Pressure Nozzles can increase pressure and accelerate the flow of a liquid. By tightening the nozzle, she increased the water pressure for cleaning.