What is the meaning of どれ?

indeterminate demonstrative pronoun:

  1. which... (of three or more choices)
  2. which way...; where...

    which... (of three or more choices)

    which way...; where...

    indeterminate personal pronoun:

    1. which... (three or more persons)
    2. (by) who...

      which... (three or more persons)

      (by) who...

      a filled pause in speech:

      1. well, ...
      2. let me see, ...; let's see, ...

      well, ...

      let me see, ...; let's see, ...

      Source: wiktionary.org