Dictionary.net

Being safe, freedom from danger or risks, (there is s. in numbers Provencal; is in s.; cannot do it with s.; play for s., avoid risks in game or fig.); safeness, being sure or likely to bring no danger, (is the s. of the experiment certain?; factor or coefficient of s. in engineering, ratio of material\'s strength to strain to be allowed for); (also s.-bolt) contrivance for locking gun-trigger, gun with this; (also s.-bicycle) bicycle of usual low-saddled modern form (opp. ordinary); s.-fuse, that can be ignited at safe distance; s.-lamp, miner\'s so protected as not to ignite fire-damp; s.-match, only igniting on prepared surface; s.-pin, with point that returns to head& is caught in a guard so that wearer may not be pricked nor pin come out; s.-razor, kinds with guard to prevent cutting chin &c.; s.-valve in steam boiler, opening automatically to relieve excessive pressure, (fig.) means of giving harmless vent to excitement &c. (sit on the s.-v., follow policy of repression). [French]