guardrail

n. banister, handrail, rail (to prevent falling, accidents, etc.)

Guardrail can refer toGuard rails installed on road sides for automobile safetyRoof edge protection, rails installed on roofs to protect construction and roofing workers
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Noun
1. a railing placed alongside a stairway or road for safety
(synonym) safety rail
(hypernym) railing, rail

n. guardrail, crash barrier, rail along a road which protects a car in an accident

Synonyms and related words:
aegis, arm guard, backstop, buffer, bulwark, bumper, contraceptive, copyright, crash helmet, cushion, dashboard, dodger, face mask, fender, finger guard, foot guard, fuse, goggles, governor, guard, hand guard, handrail, hard hat, helmet, insulation, interlock, knee guard, knuckle guard, laminated glass, life preserver, lifeline, lightning conductor, lightning rod, mask, mudguard, nose guard, pad, padding, palladium, patent, pilot, preventive, prophylactic, protective clothing, protective umbrella, safeguard, safety, safety glass, safety plug, safety rail, safety shoes, safety switch, safety valve, screen, seat belt, shield, shin guard, sun helmet, umbrella, windscreen, windshield