鎖(suo)具(ju)(ju)是(shi)指(zhi)起封(feng)閉(bi)作用(yong)(yong)(yong)的器具(ju)(ju),它(ta)包括(kuo)鎖(suo)、鑰匙及其附(fu)件,一般(ban)解釋為“必須用(yong)(yong)(yong)鑰匙方能(neng)開(kai)脫的封(feng)緘器”,現在,鎖(suo)具(ju)(ju)除(chu)用(yong)(yong)(yong)鑰匙開(kai)啟外,還可(ke)以用(yong)(yong)(yong)光、電、磁、聲及指(zhi)紋等(deng)指(zhi)令開(kai)啟。鎖(suo)具(ju)(ju)不單是(shi)防護(hu)用(yong)(yong)(yong)品,還具(ju)(ju)有(you)“管(guan)理”和“裝飾”的作用(yong)(yong)(yong)。在國際交往中也有(you)一種(zhong)禮儀,用(yong)(yong)(yong)贈送象征性的“鑰匙”作為友(you)誼的表示。