We're studying commonly used distributions in class, but I still have no idea what a distribution is.

What does it mean when someone says,"X (random variable) follows a normal distribution, bernoulli distribution, poisonn dist, etc?"I know what random vars are, I just don't understand the language: follows a [something] distribution.

It seems to me that these distributions are liketemplates. And given a population, the population will fit/follow one of these templates. Am I at all on the right track?

For example, given a sample of ages of students at a school, you will be able to categorize what distribution/template the sample fits/follows?

Any explanations of this whole standard distributions would be very helpful. Thank you.