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)

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