<p><strong>Noun</strong></p><ul><li>a musical composition or a passage or section in a musical composition written for performance by one singer or instrumentalist, with or without accompaniment: She sang a solo.</li><li>any performance, as a dance, by one person.</li><li>a flight in an airplane during which the pilot is unaccompanied by an instructor or other person: I'll be ready for my first solo next week.</li><li>a person who works, acts, or performs alone: He used to sing with a quartet, but now he's a solo.</li><li>a person who performs or accomplishes something without the usual equipment, tools, etc.</li><li>Informal. an announcement, commercial offering, etc., made to only one person or a selected group of such persons: Each month the firm sends a solo to its best customers.</li><li>any of certain games in which one person plays alone against others.</li></ul><p><strong>Adjective</strong></p><ul><li>performing alone: a part for solo bassoon.</li><li>performed alone; not combined with other parts of equal importance; not concerted.</li><li>alone; without a companion or partner: a solo flight.</li></ul><p><strong>Adverb</strong></p><ul><li>on one's own; alone or unaccompanied: After six lessons he was flying solo.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to perform or do a solo: to solo on the trumpet.</li><li>to pilot a plane, glider, etc., unaccompanied, especially for the first time: After the course the students should be able to solo.</li><li>to perform or accomplish something by oneself.</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to pilot (a plane, glider, etc.) unaccompanied.</li><li>to allow (a student pilot) to pilot a plane, glider, etc., alone: The instructor decided to solo the student.</li></ul>