first-class mail

Letters that make first-class mail

s, a, f, l, c, m, r, t, i are letters that make 'first-class mail'

mail, MA, la, ail, IRS, IR, lass, ma, fir, cl, mA, SS, first, il, first-class, as, AI, ass, class, ai, AS, IL, LA, As, Cl, Ir, La are words within 'first-class mail'

1 possible definitions for 'first-class mail'

Under this definition, first-class mail is a noun and has the following properties:

first class, 1st class, 1st-class mail have the same meaning as 'first-class mail'

'first-class mail' can be a type of mail.

correspondence is a type of first-class mail.