Definition of whomever in US English:

whomever

pronoun

literary, formal
  • Used instead of “whoever” as the object of a verb or preposition.

    ‘I'll sing whatever I like to whomever I like’
    • ‘I vote for whomever is closest to my personal goal and not to what a particular party or view holds dear.’
    • ‘As a single man, he is entitled to see whomever he wants.’
    • ‘Most important, I had many friends there who offered to help and introduce us to whomever we wanted to meet.’
    • ‘How do we expect to be secure in our region unless we agree completely with everything said by whomever happens to be in power?’
    • ‘Growers must always be allowed to do business with whomever they wish.’

Pronunciation

whomever

/humˈɛvər//ho͞omˈevər/