adverb

1. To the (explicitly stated) extent that.

   “It was so hot outside that all the plants died.  He was so good, they hired him on the spot.”

2. To the (implied) extent.

   “I need a piece of cloth so long. [= this long]”

3. In a particular manner.

   “Place the napkin on the table just so. If that's what you mean, then say so; (or do so).”

Synonyms: like, this, thus, much, really, truly, very, that

adverb

1. (modal adverb) Without doubt, certainly.

   “"Did you kill that bear yourself?" ―"I sure did!"”