My Dad was a alcoholic, Alcoholism, also known as alcohol use disorder (AUD), is a broad term all alcohol related disorders
That is not fun. I do not drink at all.
alcohol abuse and alcohol dependence. were the two ways they used to  classify it
I had a uncle who had alcohol dependence.
a person drinks large amounts over a long time period, has difficulty cutting down, acquiring and drinking alcohol takes up a great deal of time are both ways you can identify a alcoholic 
That sounds like my uncle.
Did he ever do anything risky like drink and drive?