used to answer a greeting, an insult, etc.; If you have no objection; if it makes no difference to you (usually in “if it’s (all) the same to you”).
Oxford75% of films
used to answer a greeting, an insult, etc.
Editorial17% of films
If you have no objection; if it makes no difference to you (usually in “if it’s (all) the same to you”).
Definitions from the Oxford Advanced Learner's Dictionary, 9th edition