"Rick McPherson" wrote in message
...
Where is "solo" defined beyond 61.87 (a)? For example, solo night, and/or solo
x/c in relation to commercial certificate.


I don't have an answer for you, but a little "fun fact" is that the
definition that you found in 61.87(a) specifically applies only to Subpart C
(Student Pilot), and therefore has nothing to do with the Commercial Certificate
requirements.

Vaughn