and so uncommon adverb 1. subsequently or soon afterward (often used as sentence connectors) “then he left” “go left first, then right” “first came lightning, then thunder” “we watched the late movie and then went to bed” “and so home and to bed” Synonymsthensoand soand then Related words Word family and so onand so forth WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.