rr

abbr. US 1 railroad.
2 rural route.

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abbreviation

1. [Latin rarissime] very rarely

2. rear

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abbrev

Right Reverend

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abbr.

■ railroad

■ rural route

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abbr

1 railroad

Turn left at the RR crossing.

2 or R.R. US rural route

◇ The abbreviation RR is used in mailing addresses to places that are located in the country to show which delivery route the mailbox is located on.

RR 5, Box 653