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1. One of eight offspring delivered at a single birth.
2. A group or combination of eight associated by common properties or behavior.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
a. any of the eight young produced from a multiple birth
b. (as modifier): octuplet sisters.
2. (Biology) (as modifier): octuplet sisters.
3. (Classical Music) another name for octet1
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014