thumb-suck·​ing -ˌsək-iŋ How to pronounce thumb-sucking (audio)
: the habit especially of infants and young children of sucking a thumb

Dictionary Entries Near thumb-sucking

Cite this Entry

“Thumb-sucking.” Medical Dictionary, Merriam-Webster, Accessed 21 May. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!