Definitions

1. noun

relating to or resembling dusk; dimly lit or obscure

“The subfusc lighting in the old mansion created an eerie atmosphere.”

2. adjective

unofficially connected with a university; especially relating to the gowns worn by students on formal occasions

“The subfusc attire worn by the students added a touch of elegance to the ceremony.”

3. adverb

in a dimly lit or obscure manner

“The play was performed subfusc, with actors dressed in dark colors.”