lucid

lucid (ˈluːsɪd)

—*adj*
1.	readily understood; clear
2.	shining or glowing
3.	psychiatry of or relating to a period of normality between periods of insane or irresponsible behaviour

[C16: from Latin lūcidus full of light, from lūx light]

lu'cidity

—n

'lucidness

—n

'lucidly

—*adv*

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source

Etymonline

Word Origin & History

lucid

1591, "bright, shining," from L. lucidus "light, bright, clear," from lucere "to shine," from lux (gen. lucis) "light," from PIE base *leuk- "to shine, be bright" (see light (n.)). Sense of "easy to understand" first recorded 1786. Lucid interval "period of calm or temporary

sanity" (1581) is from M.L. lucida intervalla (pl.), which was common in medieval Eng. legal documents (cf. non est compos mentis, sed gaudet lucidis intervallis).

FOLDOC

Computing Dictionary

LUCID definition

1. Early query language, ca. 1965, System Development Corp, Santa Monica, CA. [Sammet 1969, p.701].
2. A family of dataflow languages descended from ISWIM, lazy but first-order.
Ashcroft & Wadge , 1981.
They use a dynamic demand driven model. Statements are regarded as equations defining a network of processors and communication lines, through which the data flows. Every data object is thought of as an infinite stream of simple values, every function as a filter. Lucid has no data constructors such as arrays or records. Iteration is simulated with 'is current' and 'fby' (concatenation of sequences). Higher-order functions are implemented using pure dataflow and no closures or heaps.
["Lucid: The Dataflow Language" by Bill Wadge wwadge@csr.UVic.CA and Ed Ashcroft, c. 1985]. ["Lucid, the Dataflow Programming Language", W. Wadge, Academic Press 1985].
(1995-02-16)

Example sentences

The moonlight, which seems so lucid and brilliant when you look up, is all

pearl and smoke round the pond and the hills.

He insisted he was perfectly alert and lucid, adding that he was not a

publicity hound, either.

They are lucid, they get all their laughs, but the price of their cultivation

is an unfortunate absence of urgency.

Lucid about ideas and actions, he was lucid also about himself.

Enjoy Dictionary.com ad-free! Learn more

impenetrable intelligible lucent lucerne organic pellucid

Matching Quote

"It is thus that the few rare lucid well-disposed people who have had to struggle on the earth find themselves at certain hours of the day or night in the depth of certain authentic and waking nightmare states, surrounded by the formidable suction, the formidable tentacular oppression of a kind of civic magic which will soon be seen appearing openly in social behavior."

-Antonin Artaud