lose, loose, chose and choose

I'm trying to understand the definitions of lose, loose, chose and choose. Are the definitions different between the UK and USA?

I know them as
Lose {Have something taken away or lost}

Loose {Not firmly attached}

Chose {Past tense of Choose}

Choose {Decide from among a collection of objects / make a deliberate decision}

I see the misuse of these words often based on my perception of their definitions

Carson