Functions as a determiner placed before a noun.
Definitions
Used before a noun to refer to any chosen person or thing from a limited set, when it does not matter which. Take whichever route seems quickest.
Introduces a subordinate clause with the sense ‘no matter which’.
Definitions
Introduces a clause expressing that the choice does not affect the outcome; ‘no matter which’. Whichever way you look at it, the result is the same.