first class

Noun first class has 3 senses

• first class(n = noun.attribute) - the highest rank in a classification;
is a kind of high quality, superiority

• first class(n = noun.communication) 1st class, 1st-class mail, first-class mail - mail that includes letters and postcards and packages sealed against inspection;
is a kind of mail
has particulars: correspondence

• first class(n = noun.artifact) - the most expensive accommodations on a ship or train or plane;
is a kind of accommodation

Adverbial first class has 1 sense

• first class(r = adv.all) - by first class conveyance; with first class accommodations; "we always travel first class"

first class