Synonyms: responsive
Definition: readily reacting or replying to people or events or stimuli; showing emotion
Usage: children are often the quickest and most responsive members of the audience
Similar words: respondent, answering
Definition: replying
Usage: an answering glance; an answering smile
Synonyms: reactive, responsive
Definition: reacting to a stimulus
Usage: the skin of old persons is less reactive than that of younger persons
Similar words: sensitive
Definition: responsive to physical stimuli
Usage: a mimosa's leaves are sensitive to touch; a sensitive voltmeter; sensitive skin; sensitive to light