Definition of "spaced" [spaced]

• Slang Spaced-out. (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.

• "So if you're among the publishing folk it wouldn't hurt to put it out there that TNR double-spaced is super duper."
• "This is called "spaced conditioning," and it is found across all species."
• "This is known as spaced repetition, and is a very effective way of learning."