Tank is a kind of all track armored vehicle, usually equipped with one gun and many automatic weapons. It has excellent cross-country mobility, strong armor protection, strong firepower and strong assault ability.
Tank is the best defensive, mobile and firepower unit on the battlefield. This nature will not change in the past, present and future. The ability of assault is the strongest and the ability of survival is the highest. This is the meaning of tank.
Source: @jaco_pisciotta