Definition of lower verb from the Oxford Advanced Learner's Dictionary

 

lower2

 verb
(also lour)verb
BrE BrE//ˈlaʊə(r)//
 
; NAmE NAmE//ˈlaʊər//
 
[intransitive](literary)Verb Forms present simple I / you / we / they lower
BrE BrE//ˈlaʊə(r)//
 
; NAmE NAmE//ˈlaʊər//
 
he / she / it lowers
BrE BrE//ˈlaʊəz//
 
; NAmE NAmE//ˈlaʊərz//
 
past simple lowered
BrE BrE//ˈlaʊəd//
 
; NAmE NAmE//ˈlaʊərd//
 
past participle lowered
BrE BrE//ˈlaʊəd//
 
; NAmE NAmE//ˈlaʊərd//
 
-ing form lowering
BrE BrE//ˈlaʊərɪŋ//
 
; NAmE NAmE//ˈlaʊərɪŋ//
 
 
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(of the sky or clouds) to be dark and threatening Huge clouds lowered over the bay.
See the Oxford Advanced American Dictionary entry: lower