debut   noun
(also début)
/deɪˈbyu; ˈdeɪbyu/

   the first public appearance of a performer or sports player
He will make his debut in the major leagues this week.
the band's debut album
She's making her New York debut at Carnegie Hall.


incubator noun
/ˈɪŋkyəˌbeɪt̮ər/ 

1 a piece of equipment in a hospital that new babies are placed in when they are weak or born too early, in order to help them survive
   Their baby was so small she spent three weeks in an incubator before going home.

2 a machine like a box where eggs are kept warm until the young birds are born


I use the "Oxford Advanced American Dictionary".
I think this is a great dictionary website.
Because this is the most simple English explanations to let me know the other meaning of the English word.