um

interjection
  1. 1

    An expression used to show contentment for something

    โ€œMmm, this is a tasty pie!โ€

  2. 2

    An expression used to show thought or reflection

    โ€œMmm, I see what you mean.โ€

  3. 3

    An expression used to show being muffled or not able to speak clearly, as well as "mmph".

  4. 4

    Yes.

verb
  1. 1

    To make the um sound to express uncertainty or hesitancy.

interjection
  1. 1

    Expression of hesitation, uncertainty or space filler in conversation. See uh.

    โ€œLetโ€™s see... um... how about this?โ€

preposition
  1. 1

    Around, about; after.

noun
  1. 1

    Alternative spelling of ยตm

Source: https://en.wiktionary.org/wiki/mmm, https://en.wiktionary.org/wiki/um