Definitions
There are 2 meanings of the phrase
Critical Mass.
Critical Mass - as a noun
The minimum amount (of something) required to start or maintain a venture
Example: "The battle for the computer market has now reached critical mass"
The minimum mass of fissionable material that can sustain a chain reaction
Example Sentences
"In order for the movement to succeed, we need to reach a critical mass of supporters."
"The company's new product achieved critical mass and quickly became popular."
"Once the team reached a critical mass of talent, they started winning consistently."
"The protest gained critical mass as more and more people joined in."
"The scientific breakthrough reached a critical mass of evidence to support its validity."