UPSTREAM

upstream

(adjective) in the direction against a stream’s current

upriver, upstream

(adverb) toward the source or against the current

Source: WordNet® 3.1

Etymology

Adjective

upstream (not comparable)

in a direction against the flow of a current or stream of fluid (typically water); upriver

(oil industry) involving exploration and pre-production rather than refining and selling

(computing) in the direction from the client to the server

(open-source software) maintained, owned or associated with the original developers of the given software; in contrast to a modified version downstream

(biology) towards the leading end (5′ end) of a DNA molecule

Antonyms

• downstream

Adverb

upstream (comparative more upstream, superlative most upstream)

Against the current.

Antonyms

• downstream

Verb

upstream (third-person singular simple present upstreams, present participle upstreaming, simple past and past participle upstreamed)

(intransitive) To stream upward.

(transitive, open-source software) To have (a software library, patch, etc.) accepted by the original developers of the related software, so that they maintain and distribute it.