n. 1. The ordinal number matching the number eight in a series. 2. One of eight equal parts. [Middle English eighthe, from Old English eahtotha, from eahta, eight; see oktō(u) in the Appendix of Indo-European roots.] eighth adv. & adj. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.