The Collaborative International Dictionary of English v.0.48:

Strict \Strict\, a. [Compar. Stricter; superl. Strictest.]
   [L. strictus, p. p. of stringere to draw or bind tight, to
   strain. See Strain, and cf. Strait, a.]
   1. Strained; drawn close; tight; as, a strict embrace; a
      strict ligature. --Dryden.
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   2. Tense; not relaxed; as, a strict fiber.
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   3. Exact; accurate; precise; rigorously nice; as, to keep
      strict watch; to pay strict attention. --Shak.
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            It shall be still in strictest measure. --Milton.
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   4. Governed or governing by exact rules; observing exact
      rules; severe; rigorous; as, very strict in observing the
      Sabbath. "Through the strict senteries." --Milton.
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   5. Rigidly; interpreted; exactly limited; confined;
      restricted; as, to understand words in a strict sense.
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   6. (Bot.) Upright, or straight and narrow; -- said of the
      shape of the plants or their flower clusters.
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   Syn: Exact; accurate; nice; close; rigorous; severe.

   Usage: Strict, Severe. Strict, applied to a person,
          denotes that he conforms in his motives and acts to a
          principle or code by which he is bound; severe is
          strict with an implication often, but not always, of
          harshness. Strict is opposed to lax; severe is opposed
          to gentle.
          [1913 Webster]

                And rules as strict his labored work confine,
                As if the Stagirite o'erlooked each line.
                                                  --Pope.
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                Soon moved with touch of blame, thus Eve:
                "What words have passed thy lips, Adam severe!"
                                                  --Milton.
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   The Strict Observance, or Friars of the Strict
   Observance. (R. C. Ch.) See Observance.
      [1913 Webster]

WordNet (r) 3.0 (2006):

strict
    adj 1: rigidly accurate; allowing no deviation from a standard;
           "rigorous application of the law"; "a strict vegetarian"
           [syn: rigorous, strict]
    2: (of rules) stringently enforced; "hard-and-fast rules" [syn:
       hard-and-fast, strict]
    3: characterized by strictness, severity, or restraint [syn:
       nonindulgent, strict] [ant: indulgent]
    4: incapable of compromise or flexibility [syn: rigid,
       strict]
    5: severe and unremitting in making demands; "an exacting
       instructor"; "a stern disciplinarian"; "strict standards"
       [syn: stern, strict, exacting]

Moby Thesaurus II by Grady Ward, 1.0:

165 Moby Thesaurus words for "strict":
   Sabbatarian, Spartan, Spartanic, absolute, absolutist,
   absolutistic, accurate, arbitrary, aristocratic, arrogant,
   aspersion, astringent, attentive, austere, authoritarian,
   authoritative, autocratic, bigoted, bossy, careful, censorious,
   choicy, choosy, circumscription, close, cold-blooded, complete,
   compulsive, confining, conscientious, constant, constrictive,
   correct, cramp, creedbound, critical, defined, delicate, demanding,
   despotic, detailed, dictatorial, direct, discriminating,
   discriminative, dogmatic, domineering, dour, draconian,
   evangelical, even, exact, exacting, exigent, express, exquisite,
   faithful, fastidious, feudal, fine, finical, finicking, finicky,
   firm, forbidding, fundamentalist, fussy, grim, grinding, hard,
   hard-boiled, harsh, hidebound, high-handed, hyperorthodox,
   imperative, imperial, imperious, inerrable, inerrant, infallible,
   inflexible, ironhanded, just, limitation, literalist, literalistic,
   lordly, magisterial, magistral, masterful, mathematical,
   meticulous, micrometrically precise, microscopic, minute,
   monocratic, narrow, nice, obloquy, oppressive, overbearing,
   overconscientious, overruling, overscrupulous, particular,
   peremptory, perfectionistic, picky, pinpoint, pitiless, precise,
   precisianist, precisianistic, precisionistic, priggish, prudish,
   punctilious, punctual, purist, puristic, puritanic, puritanical,
   refined, reflection, religious, religiously exact, repressive,
   right, rigid, rigorist, rigorous, rugged, ruthless, scientific,
   scientifically exact, scrupulous, scrutinizing, selective,
   sensitive, severe, slam, slur, square, staunch, stern, stint,
   straitlaced, stricture, stringent, subtle, suppressive,
   tender-conscienced, thorough, tough, tyrannical, tyrannous,
   uncompromising, undeviating, undistorted, unerring, unsparing,
   unsympathetic, veracious, veridical



The Free On-line Dictionary of Computing (30 December 2018):

strict

   A function f is strict in an argument if

   	f bottom = bottom

   (See bottom).  In other words, the result depends on the
   argument so evaluation of an application of the function
   cannot terminate until evaluation of the argument has
   terminated.

   If the result is only bottom when the argument is bottom
   then the function is also bottom-unique.

   See also strict evaluation, hyperstrict.

   (1995-01-25)