Definitions for "NER TAMID"
"Eternal Lamp" (Exo. 27: 20-21 and Lev. 24:2) A continually burning lamp that was to be placed in the Tent of Meeting and later in the Temple.
the everburning light which is set above the Holy Ark and symbolises the eternal presence of God.
(Hebrew: "perpetual light") In Jewish architecture: A light (now more often battery and/or electric than an oil lamp) that burns perpetually in synagogues as a symbolic reminder of the Temple menorah.