The kanji and the word are exactly the same. That means they share meanings as well.
The reading is the on'yomi reading that you learned with the kanji, probably because it normally gets added on to other things, like the names of the state. Examples: カリフォルニア州, ニューヨーク州, etc.
State of Maine
I was born in the state of Idaho.
Can you name all ten provinces in Canada?
Due to the state's rule, you can't enter with a car here.