Definition of "attention span" []

• The length of time during which a person can concentrate on a subject or idea. (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.

• "Goody tried to fade back as the ogre's short attention span made him forget what had annoyed him."
• "While the komodos rest and digest, the tourists lose interest and drift away, reconfirming still again the truth that Homo sapiens in general has the attention span of a cricket."
• "Like most brilliant people, my father either had a short attention span or he hyperfocused; when I swam he was completely present and focused only on me."