1d

proper noun

The British boy band One Direction.

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Meanings

1d1

noun1d (plural 1ds)

plural 1ds

  1. IrelandUKabbreviationhistoricalAbbreviation of one penny (a coin with the value of 1 pence/penny; 1/240th of a pound, in pre-decimalisation currency, never used for 'one new penny').

1d2

adjective1d (comparative more 1d, superlative most 1d)

comparative more 1d · superlative most 1d · alternative 1-d · alternative 1-D · alternative 1D

  1. abbreviationinitialismInitialism of one-dimensional.

1D3

adjective1D (not comparable)
  1. abbreviationnot comparableAbbreviation of one-dimensional.
noun1D (plural 1Ds)

plural 1Ds

  1. abbreviationinitialismAmerican footballInitialism of first down.
proper noun
  1. The British boy band One Direction.

Origin

From 1 + d (“old penny”).

Full word history & related roots →
Cite this entry
APA

1d. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/1d

MLA

“1d.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/1d. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “1d,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/1d.

Source: 1d on Wiktionary, CC BY-SA 4.0.