Definitions

1. noun

a garment with a tight-fitting collar that covers the neck and is usually worn by men

“He wore a turtleneck sweater with his jeans and boots.”

2. noun

a style of neckwear in which the collar is pulled up tightly to cover the neck

“The model’s outfit included a turtleneck and a pair of fitted trousers.”

3. verb

to wear a garment with a turtleneck

“He turtlenecks in the winter to stay warm.”