Is my rock with holes in it a meteorite?
Almost certainly not, because round holes and bubbles usually mean volcanic rock or industrial slag, formed as gas escaped from molten material. Meteorites are normally solid, with only shallow dents on the surface.
Holes are one of the most common reasons a rock is rejected as a meteorite, so it helps to know where they come from. Round cavities in a rock are usually vesicles, bubbles left behind when gas escaped from molten rock or metal. On Earth, lava full of gas cools into bubbly rocks such as scoria and pumice, and molten waste from furnaces cools into slag, which is often dark, heavy and magnetic as well. Both are common, and both regularly fool hopeful collectors.
Meteorites rarely look like this. Most formed without much gas around, so their interiors are compact and solid. On the outside, many meteorites do have dents called regmaglypts, but these are shallow, smooth, thumbprint-shaped hollows carved as the surface melted and streamed away during the fall. They cover the surface like a hammered metal bowl rather than punching deep round tunnels into the stone.
There are a few genuine exceptions. Some iron meteorites develop deep holes as they weather on Earth, when nodules of the iron sulfide mineral troilite or patches of rusted metal are eaten away. The great Willamette iron in Oregon has large hollows formed largely this way. A small number of rare stony meteorites, crystallised from volcanic melts on their parent bodies, also contain small gas bubbles. These are unusual, and they have other meteorite features as well, such as a fusion crust.
So if your stone has many round bubbles, is glassy in places or has swirled patterns, slag or volcanic rock is the likely answer. If you still think it is special, photograph it with a ruler and ask a museum or university geology department. Please don't break it or test it with acid or heat.