the GNU version of the Collaborative International Dictionary of English
adj. See tripping, a., 2.
The Century Dictionary and Cyclopedia
In heraldry, represented as walking or trotting, having usually one of the fore hoofs lifted and the other three on the ground: said of one of the beasts of chase, as the antelope or the hart. Also tripping.
Word Usage
"On a field tenney a buck, trippant, proper, unattired."