It means it is not contiguous. Hawaii and Alaska are not contiguous states.
The smallest US State, contiguous or otherwise is Rhode Island.
Maine is the easternmost state in the contiguous 48 states of the US.
California is the closest contiguous state to Hawaii
Alaska
The state with the longest coastline in the US is Alaska.
A state, because it is a state, is inside the US. There are two states that are non-contiguous.
Texas
You answered your own question. There are the Continental United States , or contiguous states, and the non-contiguous States . Although Alaska is continental , it touches no other state.
The state of Hawaii does not have any neighboring states. This is because Hawaii is separated from the contiguous US and is a non contiguous state along with Alaska. This means they not connected by land to any other US state.
I am assuming by east to west coast you mean the Contiguous US, or the Lower 48. In which case Texas would be the largest state.
Hawaii and Alaska.