Starting a new private university in London would require hundreds of millions to achieve critical mass.

The issue of immigration finally seems to have achieved critical mass.

Respondents further claim that the law school is achieving "critical mass."

Network effects become significant after a certain subscription percentage has been achieved, called critical mass.

To achieve critical mass, you have to get people on line.

It took a long time for that to happen, but we've finally achieved critical mass.

"It's how we hope to achieve critical mass," he said.

And it's sort of having a hard time achieving critical mass.

"It has achieved critical mass and should experience strong growth in the next couple of years."

"We are addressing all of the issues that prevented us from achieving critical mass in the past."