So (4)

'so' is the definition.
(synonyms)
This is all the clue.
(Other definitions for thus that I've seen before include "Like so" , "Therefore, hence" , "Consequently" , "as indicated" , "an original Christmas gift" .)
'so' is the definition.
(synonyms)
This is all the clue.
(Other definitions for ergo that I've seen before include "Therefore (Latin)" , "Thus" , "so philosopher wrote in Latin" , "Hence" , "'Cogito, ---- sum'" .)
'so' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for therefore that I've seen before include "has a triangular formation in maths?" , "Thus" , "as result" , "Consequently - for that reason" , "Ergo" .)
'so?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for and that I've seen before include "Joining word" , "It connects words, clauses or sentences" , "it needs wholly positive input for positive result" , "& 18 You bet!" , "Word to connect" .)
'so' is the definition.
('so' in Latin)
This is all the clue.
(Other definitions for sic that I've seen before include "Thus among musicians" , "Quoted exactly as in the original; so" , "poorly spelt if requiring this" , "Thus in Corsica" , "Word to call attention to a quoted mistake" .)
'so' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hence that I've seen before include "Thus" , "From this time, or for this reason" , "For this reason; in the future" , "As a result" , "As a consequence" .)
(Another definition for what of it that I've seen is " does it matter?".)