Word.ws English Dictionary

rd

rd is the abbreviation of road.

rd is the symbol for rad (unit of measure for absorbed dose of rad.

rd is the abbreviation of round.

Meaning of road

Noun

road (plural roads)

  1. A way used for travelling between places, originally one wide enough to allow foot passengers and horses to travel, now (US) usually one surfaced with asphalt or concrete and designed to accommodate many vehicles travelling in both directions. In the UK both senses are heard: a country road is the same as a country lane.
    • In the lightness of my heart I sang catches of songs as my horse gayly bore me along the well-remembered road.1852, Mrs M.A. Thompson, “The Tutor's Daughter”, in Graham's American Monthly Magazine of Literature, Art, and Fashion, page 266
  2. (uncountable) Roads in general as a means of travel, especially by motor vehicle.
    • We travelled to the seaside by road.
  3. (dated) A physical way or route.
    • He stirred up his hair with his sprightliest expression, glanced at the little figure again, said ‘Good evening, ma ‘am; don’t come down, Mrs Affery, I know the road to the door,’ and steamed out.1855 December – 1857 June, Charles Dickens, Little Dorrit, London: Bradbury and Evans, […], published 1857, →OCLC
  4. (figuratively) A path chosen, as in life or career.
    • the road to happiness; the road to success.
  5. An underground tunnel in a mine.
  6. (US, archaic) A railroad.
    • [in 1846 or 1847, Davis K. Carter said,] ["]I have come to deal in practical matters, and to serve notice on you, gentlemen, that we out west, comprising the backbone, not only of Ohio but of the western continent, mean business. A road is to be built from this city [Pittsburgh], through Massillon...1926 [1847], Bessie V. R. Skinner, quoting Davis K. Carter, Massillon, Once Upon a Time, Independent Publishing Company, page 27

See all 14 meanings of road

Meaning of rad

Noun

rad (plural rads)

  1. A non-SI unit of absorbed dose of radiation, equal to 0.01 gray, that is, 1 centigray.
    • Near-synonyms: centigray, cGy (same physical quantity)
    Synonyms:
    centigray

Noun (1) capitalized: RD

RD (countable and uncountable, plural RDs)

  1. (abbreviation, initialism) Initialism of red dwarf.
  2. (US, abbreviation, initialism) Initialism of restricted data.
    • Under these restrictions, the only way for nuclear information that had been classified as RD to be controlled under UCNI is for the information to be declassified and then for circumstances to change such that the information becomes sufficiently sensitive to warrant reassertion of some degree of...1995, National Research Council, Division on Earth and Life Studies, Commission on Geosciences, Environment and Resources, A Review of the Department of Energy Classification
  3. (US, abbreviation, initialism, uncountable) Initialism of rural delivery, formerly used when addressing mail.
  4. (abbreviation, initialism, professional title) Initialism of registered dietitian.
  5. (abbreviation) Abbreviation of right defence/defense: the right wing player defensive position.
  6. (US, abbreviation, initialism) Initialism of reporting district.
  7. (abbreviation, initialism) Initialism of restrictive dermopathy.

Noun (2) capitalized: Rd

Rd

  1. (abbreviation) Abbreviation of Road.
    • A reception will be held on Sunday at the Smith residence, 234 Stone Hollow Rd, Barringtonville.

Forms of rd

pluralrds
alternative formrd.
pluralRDs

Questions about rd

What is rd the abbreviation of?
Rd is the abbreviation of road.
What part of speech is rd?
Rd is a noun.
What is the plural of rd?
The plural of rd is rds.

Words near rd in the dictionary

  1. rcvrs
  2. RCVS
  3. RCW
  4. RCWs
  5. RCYBP
  6. rd
  7. RD&D
  8. rd.
  9. RDA
  10. RdAc
  11. RDAs

Source and license

Adapted from Wiktionary: rd (page history and authors); RD (page history and authors); Rd (page history and authors); road (page history and authors); rad (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “rd.” Word.ws, https://word.ws/rd. Based on Wiktionary, CC BY-SA 4.0.