Definition of critical mass in English:

critical mass

Line breaks: crit|ic¦al mass


[in singular]
  • 1 Physics The minimum amount of fissile material needed to maintain a nuclear chain reaction.
    More example sentences
    • Just two months earlier, the Observer published internal documents indicating that there had been eight breaches of safety rules intended to prevent critical masses of fissile material being brought together.
    • Its basic principle is assembling a critical mass of a radioactive element with properties to spark a swift chain reaction.
    • Such explosions are caused by the accumulation of a critical mass of material falling onto the neutron star from a partner.
  • 2The minimum size or amount of resources required to start or maintain a venture: some of our new industries are now reaching critical mass
    More example sentences
    • The multicultural marketplace has reached critical mass, and it requires a new approach.
    • But until the market reaches a critical mass, dealers have to turn to other revenue streams to keep going.
    • Stephens said the company is talking to a number of larger domain name registrars about using their services as a channel to reach the required critical mass of customers.

More definitions of critical mass

Definition of critical mass in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day astrogation
Pronunciation: ˌastrəˈgāSHən
(in science fiction) navigation in outer space