A brief taxonomy on age statements for whiskey:
Age: The length of time whiskey spends in a barrel. Once bottled, whiskey doesn't age further (chemical reactions that affect taste do continue at a very slow rate, accelerated in the presence of light, but aren't counted as aging.)
Age Statement: A declaration on the bottle of the age of the whiskey in the bottle. Expressed in years, except for some young American whiskeys that state their age in months. When the whiskey is a blend of whiskeys of different ages, the age statement is the age of the youngest whiskey. Age statements are typically found on bottles of whiskey that are aged significantly longer than the law requires (e.g., 10 years and up for single malt Scotch, 6 or 8 years and up for bourbon)..
No Age Statement (NAS): Describes a bottle of whiskey that does not have an age statement. This term is most commonly applied to single malt Scotch, which traditionally included an age statement, and to expressions that formerly had an age statement.
New Age Statement: A declaration on the bottle of the universal harmonics achievable with the whiskey in the bottle, if you're open to it.
Old Age Statement: A declaration on the bottle that the whiskey in the bottle isn't nearly as good as it used to be.
Middle Age Statement: A declaration on the bottle that the whiskey in the bottle should be consumed in moderation, especially in the vicinity of wedding reception dance floors, karaoke machines, and cell phone cameras, because geez, Dad.
Middle Ages Statement: A declaration on the bottle that's in Latin, I guess, probably something about bringing it out when the abbot has a cough.
Stone Age Statement: Dark water good. No hunt tomorrow morning.
Underage Statement: A declaration on the bottle that, if you're going to sneak something from the liquor cabinet, sneak this, leave the good stuff alone -- and do not replace what you take with water, that's just going to ruin it.