Definition of "infantine" [in•fan•tine]

• Infantile; childish. (adjective)

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.

• "That, surely, is why the word infantine was rightly used in our first paragraph."
• "He knew that constable intimately, but refrained from taking notice of him, and passed on with an air and expression which were meant to convey the idea of infantine innocence."
• "Dr. Peschel places particular stress on this circumstance, and alludes to the habit of over-indulgent parents among refined nations of conforming to the humours of their children by conversing with them in a kind of infantine language, until they are several years old."