Definition of "childish" []

• Of, relating to, or suitable for a child or childhood: a high, childish voice; childish nightmares. (adjective)
• Marked by or indicating a lack of maturity; puerile: tired of your childish pranks. (adjective)
• Not complicated; simple. (adjective)
• Affected mentally by old age; senile. (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.

• "Marco Reininger, a veteran and political science major at Columbia, wrote on The Huffington Post that, despite what he called the childish catcalls that greeted Maschek, the institution as a whole is neither as elitist nor as condescending as the media firestorm suggests."
• "With tear-filled eyes, my younger siblings and I waved goodbye as one by one the older kids deserted us and what they termed our childish ways."
• "Percy, who disapproved of what he termed their childish behavior, didn't spend much time in the Gryffindor common room."