''lucid'' ▫ᴱᴺ｜Definition｜1st｜20260727004347-00-⌔

lucid - Wiktionary, the free dictionary

English

Adjective

lucid (comparativelucider or more lucid, superlativelucidest or most lucid)

• Clear; easily understood.
  • ✤ [T]he book, constructed in short, lucid episodes, can be satisfyingly read as a sequence of provocative talks, at once well informed and vatic.¹
• Mentally rational; sane.
• Bright, luminous, translucent, or transparent.
  • ✤ The atmosphere was unusually clear, as if loath to part with the daylight; but the moon, like a round of lucid snow, had risen on the sky; and a pale, soft gleam, came from the lamps amid the foliage.²
  • ✤ Pictures of growing spring and farms and homes,/With the Fourth-month eve at sundown, and the gray smoke lucid and bright, […]³

Noun

lucid (plural lucids)

• A lucid dream.
  • ✤ The day before nightmare-initiated lucids, subjects reported more depressed feelings […]⁴

Etymology

Latin lucidus, from lūceō (“shine”) + -idus.

Pronunciation

• IPA: /ˈl(j)uːsɪd/
• Audio (Southern England): 🔊
• Rhymes: -uːsɪd

Printed 2026-07-27.

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Footnotes

1. 2014 September 26, Tom Payne, “Sapiens: a Brief History of Humankind by Yuval Noah Harari, review: ‘urgent questions’ [print version: The story of our species, 27 September 2014, p. R32]”, in The Daily Telegraph (Review) ‎${}^{[1]}$: ↩

2. 1837, L[etitia] E[lizabeth] L[andon], “The Fête”, in Ethel Churchill: Or, The Two Brides. […], volume III, London: Henry Colburn, […], →OCLC, page 57: ↩

3. 1865, Walt Whitman, “When Lilacs Last in the Dooryard Bloom’d”, in Sequel to Drum-Taps: When Lilacs Last in the Dooryard Bloom’d and other poems: ↩

4. 1986, Benjamin B. Wolman, Montague Ullman, Handbook of states of consciousness, page 163: ↩