Dictionary Definition

sensitiveness

1 sensitivity to emotional feelings (of self and others) [syn: sensitivity]

2 (physiology) responsiveness to external stimuli; "sensitivity to pain" [syn: sensitivity, sensibility]

3 the ability to respond to affective changes in your interpersonal environment [syn: sensitivity] [ant: insensitivity, insensitivity]

User Contributed Dictionary

The ability to perceive sensation.
The ability to be aware of (and, usually, react with regard to) the feelings of others.