adverb & adjective
- 1Moving or situated in the opposite direction from that in which a stream or river flows; nearer to the source: [as adverb]: a salmon swimming upstream [as adjective]: the upstream stretch of the PlatteMore example sentences
- In the August sunshine the salmon battle their way upstream against the fast flowing creek.
- Lava flowing into waterways could create a hazard in the rivers upstream and enough ash would be carried by the wind to endanger aircraft and communities in the wind's direction.
- When the medieval bridge was replaced with New London Bridge in 1831, the river could flow freely further upstream.
- 1.1 Biology Situated in or toward the part of a sequence of genetic material where transcription takes place earlier than at a given point.More example sentences
- In our case, the reference set was the upstream sequences of all the Arabidopsis genes.
- The sequences upstream and downstream of the R-genes were examined to determine if clustering of genes could be detected.
- Additional upstream sequences were needed to map the recombination breakpoints more precisely.
- 1.2At a stage in the process of gas or oil extraction and production before the raw material is ready for refining.More example sentences
- He has also worked in communications, health, safety and environment at Shell, and spent much of his earlier career in upstream oil and gas production.
- Heavey said that Tullow, as an upstream producer, will benefit in the short term if oil prices take longer to fall back to $22 a barrel.
- The company's annual output also now establishes it as Canada's second-largest upstream producer.
More definitions of upstreamDefinition of upstream in:
- The British & World English dictionary