Noun

• S: (n) sodium-vapor lamp, sodium-vapour lamp (lamp in which an electric current passed through a tube of sodium vapor makes a yellow light; used is street lighting)
• direct hypernym / inherited hypernym / sister term
• S: (n) lamp (an artificial source of visible illumination)
• S: (n) source of illumination (any device serving as a source of visible electromagnetic radiation)
• S: (n) device (an instrumentality invented for a particular purpose) "the device is small enough to wear on your wrist"; "a device intended to conserve water"
• S: (n) instrumentality, instrumentation (an artifact (or system of artifacts) that is instrumental in accomplishing some end)
• S: (n) artifact, artefact (a man-made object taken as a whole)
• S: (n) whole, unit (an assemblage of parts that is regarded as a single entity) "how big is that part compared to the whole?"; "the team is a unit"
• S: (n) object, physical object (a tangible and visible entity; an entity that can cast a shadow) "it was full of rackets, balls and other objects"
• S: (n) physical entity (an entity that has physical existence)
• S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))