I. ˈ ̷ ̷| ̷ ̷ adjective
Etymology: first class
1. : of or relating to the highest grade in a series
a first-class railway carriage
a first-class honors degree
2. : of the best quality : of the highest excellence
a first-class telescope
first-class work
II. adverb
: by a first-class conveyance : with first-class accommodations
they traveled first-class