Definition of "onlay" [onlay]

• Something laid or applied over something else, as to add relief to a surface. (noun)
• Medicine A graft applied to the surface of the recipient organ or structure. (noun)
• Dentistry A cast, usually made of gold, attached to the occlusal surface of a tooth. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Procedures to correct the condition include MAGPI repair and transverse island onlay and tube repairs."
• "Patel RP, AR, Leone NT, Carr MC, Canning DA: Split onlay skin flap for the salvage hypospadias repair."
• "At any rate, I made it to work and then to my dental appointment, where they put on a temporary onlay to fix a cracked molar the permanent one goes on in a couple of weeks."