n.
1.(physiology) responsiveness to external stimuli
2.the ability to respond to physical stimuli or to register small physical amounts or differences
3.sensitivity to emotional feelings (of self and others)
4.susceptibility to a pathogen
5.the ability to respond to affective changes in your interpersonal environment
Idiom of the Day
break the ice
to relax and start a conversation in a formal situation
The party was boring until the host helped to break the ice.