adj. 1. Relating to or proceeding by sixties. 2. Sexagenarian. n. pl. sex·ag·e·nar·ies A sexagenarian. [Latin sexāgēnārius, from sexāgēnī, sixty each, from sexāgintā, sixty : sex, six; see SEX- + -gintā, ten times; see dek 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.