English · Word Candidate

upstream

/ʌpˈstɹiːm/

Proposed by a contributor, not yet supported by evidence.

Also seen as: upstreams · upstreaming · upstreamed

Sense 1

Meaning · English

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

Adjective

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Meaning · English

Occurring earlier than something else; (also, usually, especially) being an influence on something else; causing a consequence for something else.

Adjective

Input entry is upstream of input validation in the runtime process.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Meaning · English

Against the current.

Adverb

In another moment a huge wave, like a muddy tidal bore, but almost scaldingly hot, came sweeping round the bend up-stream.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

Meaning · English

To stream upward.

Verb

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).

What does “upstream” mean?

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

Is “upstream” formal or informal?

No register label has been reviewed yet — treat it as neutral and check the usage notes above.