Word.ws English Dictionary

1d

1d is the abbreviation of one penny.

1d is the initialism of one-dimensional.

Meaning of one-dimensional

Adjective

one-dimensional (not generally comparable, comparative more one-dimensional, superlative most one-dimensional)

  1. (not comparable, usually) Having length, but no width, height or depth.
    • A straight line is one-dimensional.
  2. (figuratively, not comparable, usually) Lacking depth or believability; flat.
    • one-dimensional characters
  3. (figuratively, not comparable, usually) Lacking personal depth and substance; conceited, vain, shallow, superficial.

Adjective capitalized: 1D

1D (not comparable)

  1. (abbreviation) Abbreviation of one-dimensional.

Noun capitalized: 1D

1D (plural 1Ds)

  1. (abbreviation, initialism) Initialism of first down.

Proper noun capitalized: 1D

1D

  1. The British boy band One Direction.

Forms of 1d

Noun
plural1ds
plural1Ds
Adjective
comparativemore 1d
superlativemost 1d
alternative form1-d
alternative form1-D
alternative form1D

Origin of 1d

From 1 + d (“old penny”).

Words formed from 1d

Questions about 1d

What does 1d mean?
1d means the British boy band One Direction.
What is 1d the abbreviation of?
1d is the abbreviation of one penny.
What part of speech is 1d?
1d can be an adjective, a noun or a proper noun.

Words near 1d in the dictionary

  1. 1Bs
  2. 1CC
  3. 1CCs
  4. 1Co-Co1
  5. 1Co-Co1s
  6. 1d
  7. 1der
  8. 1dered
  9. 1derful
  10. 1dering
  11. 1ders

Source and license

Adapted from Wiktionary: 1d (page history and authors); 1D (page history and authors); one-dimensional (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.

Last updated:

Cite this entry: “1d.” Word.ws, https://word.ws/1d. Based on Wiktionary, CC BY-SA 4.0.