Definify.com
Webster 1913 Edition
Inwall
In-wall′
(ĭn-wa̤l′)
, Verb.
 T.
 [
imp. & p. p. 
Inwalled 
(ĭn-wa̤ld′)
; p. pr. & vb. n. 
Inwalling
.] To inclose or fortify as with a wall. 
Spenser.
 In′wallˊ
(ĭn′wa̤lˊ)
, Noun.
 An inner wall; specifically 
(Metal.)
, the inner wall, or lining, of a blast furnace. Webster 1828 Edition
Inwall
INWALL'
,Verb.
T.
 Definition 2025
inwall
inwall
English
Noun
inwall (plural inwalls)
- The refractory lining of the stack of a blast furnace; or the interior walls or lining of a shaft furnace.
Verb
inwall (third-person singular simple present inwalls, present participle inwalling, simple past and past participle inwalled)
-  (transitive) To shut in or enclose with walls.
- (Can we find and add a quotation of Spenser to this entry?)
 
References
- United States Bureau of Mines, Dictionary of Mining, Mineral, and Related Terms (1996).