Meaning of “turtleneck” - Learner’s Dictionary

turtleneck

noun [ C ] uk us /ˈtɜːtlnek/ US (UK polo neck)

a piece of clothing that covers the top part of the body and has a tube-like part covering the neck:

a turtleneck sweater

(Definition of “turtleneck” from the Cambridge Learner’s Dictionary © Cambridge University Press)