鎖(suo)具(ju)(ju)是指起封閉作用(yong)(yong)(yong)的(de)(de)器(qi)具(ju)(ju),它包括鎖(suo)、鑰匙(chi)及其附件,一(yi)般(ban)解釋為(wei)“必須用(yong)(yong)(yong)鑰匙(chi)方能開(kai)脫的(de)(de)封緘器(qi)”,現在,鎖(suo)具(ju)(ju)除用(yong)(yong)(yong)鑰匙(chi)開(kai)啟外,還(huan)可(ke)以用(yong)(yong)(yong)光(guang)、電(dian)、磁、聲及指紋等指令開(kai)啟。鎖(suo)具(ju)(ju)不單是防護用(yong)(yong)(yong)品(pin),還(huan)具(ju)(ju)有“管(guan)理”和“裝飾(shi)”的(de)(de)作用(yong)(yong)(yong)。在國際交往中也有一(yi)種(zhong)禮(li)儀,用(yong)(yong)(yong)贈送象征(zheng)性的(de)(de)“鑰匙(chi)”作為(wei)友誼(yi)的(de)(de)表示。