Definition - What does Mature mean?
In a tasting analysis of a wine, if the term "mature" is utilized, it is to say that the wine presents all the characteristics which bring each of its elements together; fruit, acid and tannin. This is also the point when a wine can have the ability to take on tertiary aromas or those present on the finish of the wine.
WineFrog explains Mature
To say that a wine is mature is to take note that a wine has reached its pinnacle point where it can not improve further. A mature wine is one in which elements of the aroma and/or bouquet fit seamlessly along with the palate and onto the finish. A mature wine is also one which is more refined than in its youth and will show character into the finish with tertiary aromas and long-lasting lingering characteristics.