ar ‧ ma ‧ ture /ˈɑːmətʃə $ ˈɑːrmətʃər/ BrE AmE noun [countable] technical
[ Date: 1400-1500 ; Language: Latin ; Origin: armatura 'armor, equipment' , from armare ; ⇨ ↑ arm 2 ]
1 . the part of a ↑ generator , motor etc that turns around to produce electricity, movement etc
2 . a frame that you cover with clay or other soft material to make a model