/ læmp; NAmE / noun
1.
a device that uses electricity, oil or gas to produce light :
a table / desk / bicycle, etc. lamp
to switch on / turn off a lamp
a street lamp
—see also fog lamp , hurricane lamp , lava lamp , standard lamp
2.
an electrical device that produces rays of heat and that is used for medical or scientific purposes :
an infra-red / ultraviolet lamp
—see also blowlamp , sunlamp
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WORD ORIGIN
Middle English : via Old French from late Latin lampada , from Latin lampas , lampad- torch, from Greek .