So has 23 different meanings across 6 categories:
A syllable used in solfège to represent the fifth note of a major scale.
A type of dairy product, made especially in Japan between the seventh and 10th centuries, by reducing milk by boiling it.
Initialism of significant other.
A Mon-Khmer-speaking people of Laos and Thailand.
Alternative form of So.
True, accurate.
to a very great extent or degree
"the idea is so obvious"
"never been so happy"
"I love you so"
"my head aches so!"
in a manner that facilitates
"he observed the snakes so he could describe their behavior"
"he stooped down so he could pick up his hat"
in such a condition or manner, especially as expressed or implied
"They're happy and I hope they will remain so"
"so live your life that old age will bring no regrets"
to a certain unspecified extent or degree
"I can only go so far with this student"
"can do only so much in a day"
(usually followed by `that') to an extent or degree as expressed
"he was so tired he could hardly stand"
"so dirty that it smells"
(used to introduce a logical conclusion) from that fact or reason or as a result
"therefore X must be true"
"the eggs were fresh and hence satisfactory"
"we were young and thence optimistic"
"it is late and thus we must go"
"the witness is biased and so cannot be trusted"
To the (explicitly stated) extent that.
Reduced form of 'so that', used to express purpose; in order that.
Used after a pause for thought to introduce a new topic, question or story, or a new thought or question in continuation of an existing topic.
Abbreviation of someone.
Initialism of someone.
A Chinese surname, from Cantonese.