Let's say I bought a 100 Ohm resistor from a manufacturer with a tolerance of 10%. What I understand from the term tolerance here is that: it is the amount that a resistor may initially vary from its "stated nominal resistance". So in our case when I have this resistor in my hand I can say this can be between 90 to 110 Ohm.
But imagine I have a good ohmmeter and I measured this resistor as 98 Ohm.
If I install this resistor to a circuit, what can I say about the variation or accuracy of this resistor by time? Can it still vary between 90 Ohm and 110 Ohm during its operation or it will be around 98 Ohm always? Im a bit confused between tolerance and uncertainty accuracy/uncertainty here.