1. the ability to respond to affective changes in your interpersonal environment

Synonym: sensitiveness

2. the ability to respond to physical stimuli or to register small physical amounts or differences

e.g. a galvanometer of extreme sensitivity
the sensitiveness of Mimosa leaves does not depend on a change of growth

Synonym: sensitiveness

3. (physiology) responsiveness to external stimuli
the faculty of sensation

e.g. sensitivity to pain

Synonym: sensitivenesssensibility

4. sensitivity to emotional feelings (of self and others)

Synonym: sensitiveness

5. susceptibility to a pathogen

Synonym: predisposition