Meaning of UP- in English

up- /ʌp/ BrE AmE prefix

1 . making something higher:

to upgrade a job (=make it higher in importance)

2 . [especially in adverbs and adjectives] at or towards the top or beginning of something:


upriver (=nearer to where the river starts)

3 . [especially in verbs] taking something from its place or turning it upside down:

an uprooted tree

She upended the bucket.

4 . [especially in adjectives and adverbs] at or towards the higher or better part of something:

upmarket (=attracting richer people)

⇨ ↑ down-

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.