Definition of up- in English:

up-

prefix

  • 1(added to verbs and their derivatives) upwards.

    ‘upturned’
    ‘upthrow’
    1. 1.1 To a more recent time.
      ‘update’
  • 2(added to nouns) denoting motion up.

    ‘upriver’
    ‘uphill’
  • 3(added to nouns) higher.

    ‘upland’
    ‘upstroke’
    1. 3.1 Increased.
      ‘up-tempo’

Pronunciation

up-

/ʌp/