adj. 1. Of or relating to the number eight. 2. Consisting of eight members or of groups containing eight. n. pl. oc·to·nar·ies A group or set of eight. [Latin octōnārius, containing eight, from octōnī, eight each, from octō, eight; see oktō(u) in the Appendix of Indo-European roots.] |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.