Wordnet 3.0
NOUN (1)
1.
a training program in which a person is given information about physiological processes (heart rate or blood pressure) that is not normally available with the goal of gaining conscious control of them;
The Collaborative International Dictionary of English v.0.48:
biofeedback \bi`o*feed"back\ n.
a training program in which a person is given information
about physiological processes (heart rate or blood pressure)
that is not normally available with the goal of gaining
conscious control of them.
[WordNet 1.5]
WordNet (r) 3.0 (2006):
biofeedback
n 1: a training program in which a person is given information
about physiological processes (heart rate or blood
pressure) that is not normally available with the goal of
gaining conscious control of them