noun
plural sketches
[count] a quick, rough drawing that shows the main features of an object or scene
a short description of something
a short, funny performance
verb
sketches; sketched; sketching
to make a quick, rough drawing of (something) [+ obj]
[+ obj] :to describe (something) briefly
sketch in
[phrasal verb]
sketch in (something) or sketch (something) in :to add (something, such as details) to a drawing, description, etc.