n. pl. so·los
1. Music A composition or passage for an individual voice or instrument, with or without accompaniment.
2. A performance by a single singer or instrumentalist.
3. Games Any of various card games in which one player singly opposes others.
1. Music Composed, arranged for, or performed by a single voice or instrument.
2. Made or done by a single individual.
Unaccompanied; alone: flew solo from Anchorage to Miami.
v. so·loed, so·lo·ing, so·los
1. To perform a solo.
2. To fly an airplane without a companion or an instructor, especially for the first time.
To complete (a challenging endeavor) by oneself rather than with a partner or as part of a team: soloed the north face of Mt. Everest.
[Italian, from Latin sōlus, alone; see s(w)e- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.