I'm assuming you're thinking of "radiation" in the nuclear energy sense. If so, then the answer is no because they don't use radiation in the nuclear energy sense.
However, technically, the light from your lightbulb is electromagnetic radiation in the visible spectrum, which is radiation having certain wavelengths. Microwave ovens use microwaves, which are a different part of the electromagnetic radiation spectrum.
The stuff we usually think of as "radiation" - the stuff that can harm you, alpha rays, x-rays, gamma rays, doesn't come out of a microwave oven.
If a microwave oven leaked excessively, the worst it could do is make you feel a little warm next to the over when it was running.
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