Definitions
There are 2 meanings of the phrase
Curtain Raiser.
Curtain Raiser - as a noun
Any preliminary activity
A short play presented before the main play
Example Sentences
"The theater company performed a curtain raiser before the main play."
"The concert started with a curtain raiser by a local band."
"The sports event began with a curtain raiser match between two junior teams."
"The festival kicked off with a grand curtain raiser parade."
"The art exhibition featured a curtain raiser showcasing the works of emerging artists."