ur

exclamation1

1. •
   Expressing hesitation or inarticulacy; er, um.

contraction1

1. •
   (Internet) Abbreviation of you're (you are).

determiner1

1. •
   (Internet) Abbreviation of your.

noun1

1. •
   Initialism of underlying representation.

noun1

1. •
   A hypothetical early supercontinent which may have existed on Earth during the Archaean eon (3.1 billion years ago).