Definition of lath noun from the Oxford Advanced American Dictionary

 

lath

 noun
noun
NAmE//læθ//
 
(pl. laths
NAmE//læðz//
 
, NAmE//læθs//
 
)
 
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a thin narrow strip of wood that is used to support plaster (= material used for covering walls) on the inside walls and the ceilings of buildings
See the Oxford Advanced Learner's Dictionary entry: lath