Solidarity, Eastern Europe's first free trade union, born in 1980, challenged the Communists' monopoly on power.

When the cheering subsides, will local Communists really permit the new fronts to challenge their monopoly of power?

While modern telecommunications and general literacy have challenged music's monopoly on carrying information, they haven't eliminated that role.

The rates at the time were very competitive and challenged Bell Canada's monopoly.

In short, the Gurlenians would challenge the Guard's monopoly of Time.

"Everything we're doing is either challenging the government's monopoly or leveraging out the financial assets of the government," Mr. Diamond said.

The election followed a 19-day campaign that offered opposition forces the first officially sanctioned chance to challenge the governing party's monopoly on power.

Vietnam and Japan have opened a centre for research into rare earth minerals to challenge China's monopoly of supply.

The intent was to challenge Kellogg's virtual monopoly outside North America.

The second venture was a new London evening paper to challenge the Standard 's monopoly.