1.  restriction(n = noun.cognition) limitation - a principle that limits the extent of something; "I am willing to accept certain restrictions on my movements"
is a kind of regulation, rule
has particulars: narrowness, quantification, restraint

2.  restriction(n = noun.act) limitation - an act of limiting or restricting (as by regulation);
is a kind of regulating, regulation
has particulars: load-shedding, arms control, hold-down, freeze, clampdown
Derived forms verb restrict₃, verb restrict₁, verb restrict₂

3.  restriction(n = noun.act) confinement - the act of keeping something within specified bounds (by force if necessary); "the restriction of the infection to a focal area"
is a kind of restraint
has particulars: classification, specification, stipulation, circumscription, constraint
Derived form verb restrict₃

1.  The act of restricting, or state of being restricted; confinement within limits or bounds. [1913 Webster]
"This is to have the same restriction with all other recreations,that it be made a divertisement." [1913 Webster]

2.  That which restricts; limitation; restraint; as, restrictions on trade. [1913 Webster]

restriction, n.
1 the act or an instance of restricting; the state of being restricted.
2 a thing that restricts.
3 a limitation placed on action.

Derivative:
restrictionist adj. & n.

Etymology:
ME f. OF restriction or L restrictio (as RESTRICT)

N  hindrance, prevention, preclusion, obstruction, stoppage, embolus, embolism, infarct, interruption, interception, interclusion, hindrance, impedition, retardment, retardation, embarrassment, oppilation, coarctation, stricture, restriction, restraint, inhibition, blockade, interference, interposition, obtrusion, discouragement, discountenance, impediment, let, obstacle, obstruction, knot, knag, check, hitch, contretemps, screw loose, grit in the oil, bar, stile, barrier, turnstile, turnpike, gate, portcullis, beaver dam, trocha, barricade, wall, dead wall, sea wall, levee breakwater, groyne, bulkhead, block, buffer, stopper, boom, dam, weir, burrock, drawback, objection, stumbling-block, stumbling-stone, lion in the path, snag, snags and sawyers, encumbrance, incumbrance, clog, skid, shoe, spoke, drag, drag chain, drag weight, stay, stop, preventive, prophylactic, load, burden, fardel, onus, millstone round one's neck, impedimenta, dead weight, lumber, pack, nightmare, Ephialtes, incubus, old man of the sea, remora, difficulty, insuperable, obstacle, estoppel, ill wind, head wind, trammel, tether, hold back, counterpoise, damper, wet blanket, hinderer, marplot, killjoy, party pooper, party crasher, interloper, trail of a red herring, opponent, hindering, obstructive, obstruent, impeditive, impedient, intercipient, prophylactic, impedimentary, in the way of, unfavorable, onerous, burdensome, cumbrous, cumbersome, obtrusive, hindered, windbound, waterlogged, heavy laden, hard pressed, unassisted &c (assist), single-handed, alone, deserted, occurrent nubes.

N  restraint, hindrance, coercion, cohibition, constraint, repression, suppression, discipline, control, confinement, durance, duress, imprisonment, incarceration, coarctation, entombment, mancipation, durance vile, limbo, captivity, blockade, arrest, arrestation, custody, keep, care, charge, ward, restringency, curb, lettres de cachet, limitation, restriction, protection, monopoly, prohibition, prisoner, repressionist, restrained, constrained, imprisoned, pent up, jammed in, wedged in, under lock and key, under restraint, under hatches, in swaddling clothes, on parole, in custody, doing time, cohibitive, coactive, stiff, restringent, strait-laced, hidebound, barkbound, ice bound, wind bound, weather bound, cabined cribbed confined, in Lob's pound, laid by the heels.

N  prohibition, inhibition, veto, disallowance, interdict, interdiction, injunction, estoppel, embargo, ban, taboo, proscription, index expurgatorius, restriction, hindrance, forbidden fruit, Maine law, prohibitive, prohibitory, proscriptive, restrictive, exclusive, forbidding, prohibited, not permitted, unlicensed, contraband, impermissible, under the ban of, illegal, unauthorized, not to be thought of, uncountenanced, unthinkable, beyond the pale, on no account, Int, forbid it heaven!, hands off!, keep off!, hold!, stop!, desist!, cease and desist!, avast!, that will never do, don't you dare, forget it, don't even think about doing it, go ahead, make my day.

N  qualification, limitation, modification, coloring, allowance, grains of allowance, consideration, extenuating circumstances, mitigation, condition, proviso, prerequisite, contingency, stipulation, provision, specification, sine qua non, catch, string, strings attached, exemption, exception, escape clause, salvo, saving clause, discount, restriction, fine print, qualifying, qualified, conditioned, restricted, hedged, conditional, exceptional, hypothetical, contingent, provided, provided that, provided always, if, unless, but, yet, according as, conditionally, admitting, supposing, on the supposition of, with the understanding, even, although, though, for all that, after all, at all events, approximately, in a limited degree (smallness), somewhat, sort of, something like that, to a certain extent, to a degree, in a sense, so to speak, with grains of allowance, cum grano salis, with a grain of salt, exceptis excipiendis, wind and weather permitting, if possible, subject to, conditioned upon, with this proviso, if the good lord is willing and the creeks don't r, catch-, Degrees of Evidence.

restriction endonuclease, restriction enzyme, restriction fragment, restriction nuclease, restriction site