What is "undreamed-of"

Usage examples of "undreamed-of".

Here he was given a fine laboratory and a sudden undreamed-of wealth of apparatus and two assistants and enough money so that he could spend sixteen or eighteen hours of his working day among his stains and tubes and cluttering guinea-pigs.

Medon made two notable contributions to Civilization: first, electrical insulation, conductors, and switches by whose means voltages and amperages theretofore undreamed-of could be handled.

The other was one of the familiar government-owned sprayplanes that worked at low altitudes over croplands, truck gardens, and commercial orchards, delivering a heavy mist of the deadly Tri-D solution, the pesticide that had revolutionized agriculture, eliminated the bee from nature, and given us fruits and vegetables of undreamed-of perfection but very high toxicity.