Of a person: full of life and vigour, especially with a light and springy step.
Animated, gay, or vivacious; lively, spirited.
Especially of an older person: energetic and in good health; spry.
In a lively and vigorous way; sprightlily.
Lifelike.
Existing in three dimensions
Having depth, or the illusion of depth, as well as height and width.