Definition of compound adjective from the Oxford Advanced Learner's Dictionary

  

compound

 adjective
adjective
 
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BrE BrE//ˈkɒmpaʊnd//
 
; NAmE NAmE//ˈkɑːmpaʊnd//
 
[only before noun] (specialist) formed of two or more parts a compound adjective, such as fair-skinned A compound sentence contains two or more clauses.
Word Originadjective late Middle English compoune (verb), from Old French compoun-, present tense stem of compondre, from Latin componere ‘put together’. The final -d was added in the 16th cent. on the pattern of expound and propound.
See the Oxford Advanced American Dictionary entry: compound