In my house, i have a flat black disc, 12 inches across with a hole in the middle. Is this a record?

Yes, it is. Originally a "Phonograph Record" shortened to simply "Record."

<old codger mode> I remember those. They used to be called LPs (standing for Long Playing Records). 33 1/3 rpm for these, 45 rpm for 7" or 12" singles, not half a cazillion RPM like these new fangled CDs. </old codger mode>. They weighed a lot more than CDs though. Anyone interested in an 'analogue sounds better than digital' discussion?

i have a hole in middle of a 14 ins flat black disc this is a record jimmey wide used to play it

Either that or a dinner plate with a hole in it. Try spinning it on a phonograph and setting a needle down on it. If you get a sound other than plain old scratching, it may be a record.

dadgum young whippersnappers! Look for the Victorola to play your classic record!

No, I've got one that's only 7 inches!

It is, but if it's one of the flexible ones, I believe the terminology now is a 'vinyl'.

This is so old, it's grown a long white beard.

no its not. i have at least 30 of them

could be unless you have just ironed the cat.