Oxford Advanced American Dictionary

Definition of turtleneck noun from the Oxford Advanced Learner's Dictionary

turtleneck

noun
turtleneck pronunciation English ˈtɜːtlnek turtleneck pronunciation American ˈtɜːrtlnek
 
1 (also turtleneck sweater) a sweater with a high part fitting closely around the neck2 (North American English) (British English polo neck) a high round collar made when the neck of a piece of clothing is folded over; a piece of clothing with a polo neck