WordNet sense 1 (at ease in talking to others):

forthcoming, outgoing

WordNet sense 2 (inclined to or conducive to companionship with others):

sociable

WordNet sense 3 (being concerned with the social and physical environment):

extrovert, extravert, extraverted, extravertive, extrovertive

WordNet sense 4 (directed outward; marked by interest in others or concerned with external reality):

extraversive, extroversive

WordNet sense 5 (not introspective; examining what is outside yourself):

extrospective