(sō′lō) noun plural ·los or ·li (-lē)
1. A musical composition or passage for a single voice or instrument, with or without accompaniment.
2. Any of several card games, especially one in which the player who bids to take the highest number of tricks plays alone against the others.
3. Any performance accomplished alone or without assistance.
—adjective
1. Composed or written for, or executed by, a single voice or instrument; performed as a solo.
2. Done by a single person alone: a solo flight.
—v.i. ·loed, ·lo·ing To fly an airplane alone, especially for the first time. [<Ital. <L solus alone]

(sō′lō)
1. A city in central Java: formerly Surakarta.
2. The longest river of Java, flowing 335 miles north, east, and NE from south central Java to the Java Sea, opposite Madura.