penny post

noun

1

a

: a postal system carrying a letter for a penny:

(1)

: a system established in London about 1680

(2)

: the former system of Great Britain established in 1840

(3)

: a local mail service in colonial America carrying letters from post office to addressee

b

: a mail carrier in such a system

2

: a common American marsh pennywort (Hydrocotyle americana)

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now