The definition of lax is being relaxed or not strict.
(adjective)See lax in Webster's New World College Dictionary
adjective
Origin: ME < L laxus < IE base *(s)lēg-, loose, lax > slack
noun
See lax in American Heritage Dictionary 4
adjective lax·er, lax·est
Origin:
Origin: Middle English
Origin: , from Latin laxus, loose, lax; see slēg- in Indo-European roots
.Related Forms:
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