Ma'anar ƙamus na kalmar "jiragen sama" abin hawa ne da aka ƙera don yin aiki a wajen sararin duniya, yawanci don dalilai na kimiyya ko na soja, kuma galibi ana sanye da kayan aiki da na'urorin motsa jiki don kewayawa da sadarwa. Misalan jirage sun haɗa da tauraron dan adam, bincike, rovers, da motocin mutane irin su jirgin sama da sararin samaniya da tashar sararin samaniya ta duniya.