fourth-class

(fôrt̸hklas)

adjective

  1. of the class, rank, excellence, etc. next below the third
  2. ☆ designating or of a class of mail consisting of merchandise, printed matter, mailable live animals, and all other material not included in first-class, second-class, or third-class; parcel post

adverb

as or by fourth-class mail; parcel post

See fourth-class in American Heritage Dictionary 4

adjective
Of or being a class of mail consisting of merchandise and some printed matter weighing over eight ounces and not sealed against inspection.

Related Forms:

  • fourthˈ classˈ adverb

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