den·tist (d?n?t?st)n. A person who is trained and licensed to practice dentistry.[French dentiste, from dent, tooth, from Old French, from Latin d?ns, dent-; see dent- in Indo-European roots.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.dentist (?d?nt?st) n (Dentistry) a person qualified to practise dentistry[C18: from French dentiste, from dent tooth]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014den?tist (?d?n t?st) n. a person whose profession is dentistry. [1750?60;