adjective, laxer, laxest.
not strict or severe; careless or negligent: lax morals; a lax attitude toward discipline.
loose or slack; not tense, rigid, or firm: a lax rope; a lax handshake.
not rigidly exact or precise; vague: lax ideas.
open, loose, or not retentive, as diarrheal bowels.
(of a person) having the bowels unusually loose or open.
open or not compact; having a loosely cohering structure; porous: lax tissue; lax texture.
Phonetics. (of a vowel) articulated with relatively relaxed tongue muscles. Compare tense1 ( def 4 ).

1350–1400; Middle English < Latin laxus loose, slack, wide; akin to languēre to languish; cognate with Old English slæc slack1

laxly, adverb
laxness, noun
overlax, adjective
overlaxly, adverb
overlaxness, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
lax (læks)
1.  lacking firmness; not strict
2.  lacking precision or definition
3.  not taut
4.  phonetics (of a speech sound) pronounced with little muscular effort and consequently having relatively imprecise accuracy of articulation and little temporal duration. In English the vowel i in bit is lax
5.  (of flower clusters) having loosely arranged parts
[C14 (originally used with reference to the bowels): from Latin laxus loose]

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

c.1400, "loose" (in ref. to bowels), from L. laxus "wide, loose, open," from PIE base *sleg- "to be slack, be languid" (cf. Gk. legein "to leave off, stop," lagos "hare," lit. "with drooping ears," lagnos "lustful, lascivious," lagaros "slack, hollow, shrunken;" L. languere "to be faint, weary," languidis
"faint, weak, dull, sluggish, languid"). Of rules, discipline, etc., attested from mid-15c. Related: Laxity.
Online Etymology Dictionary, © 2010 Douglas Harper
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Computing Dictionary

LAX definition

LAnguage eXample.
A toy language used to illustrate compiler design.
["Compiler Construction", W.M. Waite et al, Springer 1984].

The Free On-line Dictionary of Computing, © Denis Howe 2010
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American Heritage
Abbreviations & Acronyms
Los Angeles International Airport
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
The lax falciform ligament certainly gives no support though it probably limits
  lateral displacement.
On the back of the hand and fingers the subcutaneous tissue is lax, so that the
  skin is freely movable on the underlying parts.
The government has been so lax in pursuing some oil crimes that it can seem
There is no mention of lax enforcement of the remaining regulations.
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