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Such an extension is called a simple extension.

He called this approach, slippage, or an extension beyond the implied boundary, creating ambiguous relationships in the landscape.

He called the move "a political extension of the political witch hunt that has gone on now for too long."

An arrival may be elaborated on; any such movement away from an arrival within a prolongational region is called an extension.

"I'll call and get an extension," he said of one loan.

Shifting the point of view, the larger structure is called an extension or a superstructure of its substructure.

An extension which is not conservative may be called a proper extension.

The enlarged structure s is called a definitional extension of the original structure.

This is what I would call an extension in favour of family life.