a complete turn of a rope or the like around an object.
Origin of round turn
First recorded in 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for round turn
Historical Examples of round turn
Haul well out, and take a round-turn with the earing round the cringle.The Seaman's Friend
Richard Henry Dana