critical mass

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. the minimum amount (of something) required to start or maintain a venture
- the battle for the computer market has now reached critical mass
- there is now a critical mass of successful women to take the lead
- they sold the business because it lacked critical mass
• Hypernyms:
amount
2. the minimum mass of fissionable material that can sustain a chain reaction
• Hypernyms:
mass