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laser a device that amplifies electrical impulses at mixed frequencies in or near the range of visible light by stimulating the atoms in a medium such as a gas or crystal, producing an intense, concentrated beam of light at one or more virtually distinct frequencies (acronym for "light amplified by stimulated emission of radiation").
laser disk see optical disk.
lash1 a whip or the striking part of a whip. [11 definitions]
lash2 to bind or tie down with a rope, cord, or chain.
lashing1 the action of a person or thing that lashes. [3 definitions]
lashing2 the action of binding, as with a rope, or the material used to do this.
lash-up (informal) a temporary or improvised apparatus or arrangement.
lass a girl or young woman; maiden. [2 definitions]
lassie a lass.
lassitude lack of mental or physical energy; weariness or listlessness; lethargy.
lasso a long rope with a slipping noose on one end, used to catch running animals, esp. cattle and horses; lariat. [2 definitions]
last1 coming after or finishing behind all others. [12 definitions]
last2 to persist or endure through time. [4 definitions]
last-ditch done as a final and desperate measure, effort, stand, or the like.
last hurrah a final effort or appearance, as in politics or the arts.
lasting enduring or persisting for a long time. [2 definitions]
Last Judgment in Christianity, the end of the world and the judging of each individual soul by God.
lastly in conclusion; finally.
last name a surname.
last quarter the time of month between the second half-moon and the new moon. [2 definitions]
last rites final ceremonies for a recently dead person. [2 definitions]