English

Definition of substrate noun from the Oxford Advanced Learner's Dictionary

 

substrate

 noun
noun
BrE BrE//ˈsʌbstreɪt//
 
; NAmE NAmE//ˈsʌbstreɪt//
 
(specialist)
 
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a substance or layer which is under something or on which something happens, for example the surface on which a living thing grows and feeds Word Origin early 19th cent.: anglicized form of substratum.
See the Oxford Advanced American Dictionary entry: substrate