Definition of upstream in English:


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 Platte’
    • ‘Two large streams joined the Tomahawk River approximately one-half mile upstream from the dam.’
    • ‘Follow the river upstream, ignoring another path to the left, and drop down to a weir and boardwalk by the river that leads to a track.’
    • ‘The company had three other projects upstream of the river.’
    • ‘The 30 ft-long fin whale was in danger of being beached on a mud bank in a shallow river upstream from Oysterhaven.’
    • ‘A small village, 11 km upstream the Lidder River, is a beautiful locality.’
    • ‘When the medieval bridge was replaced with New London Bridge in 1831, the river could flow freely further upstream.’
    • ‘In the August sunshine the salmon battle their way upstream against the fast flowing creek.’
    • ‘If you swim upstream in the river and struggle against the flow you give yourself a hard time and achieve nothing.’
    • ‘Water periodically released from upstream dams kill river crops downstream that grow on natural silt embankments in the summer months when the river's tide is out.’
    • ‘As we continued upstream the river narrowed between vertical rock banks and at the Lower Force dropped in a single sheet.’
    • ‘He had the right to have that river run through his land unimpaired and its quality undiminished except where it resulted from reasonable use of the river upstream.’
    • ‘Sitting 100 miles upstream of where the river pours into the Gulf of Mexico, New Orleans quickly became an important port.’
    • ‘An observation deck on a bend in the river is available so that visitors may enjoy both upstream and down stream vistas.’
    • ‘After the long, straight stretch the river continues on upstream for many more kilometres.’
    • ‘By January 4, angling clubs were reporting difficulties as the River Ouse was frozen upstream of Rawcliffe.’
    • ‘The moon is beginning to rise over the river and the city center is visible upstream where the river bends.’
    • ‘For boats leaving the canal and heading upstream to York, that means waiting until the ebb tide turns to flood, and the current reverses to flow back upstream.’
    • ‘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.’
    • ‘It felt heavy as it hugged the bottom, slowly moving out in the flow then upstream.’
    • ‘The agency expects to take about a month to complete the work, which will involve gaining access to the river over footpaths upstream of Alma Weir.’
    upstream from
    View synonyms
    1. 1.1Biology Situated in or toward the part of a sequence of genetic material where transcription takes place earlier than at a given point.
      • ‘The sequences upstream and downstream of the R-genes were examined to determine if clustering of genes could be detected.’
      • ‘Nine other sequences showed homology to regions upstream of known cereal genes.’
      • ‘Additional upstream sequences were needed to map the recombination breakpoints more precisely.’
      • ‘The same result was found for noncoding sequences upstream of accessory gland proteins.’
      • ‘In our case, the reference set was the upstream sequences of all the Arabidopsis genes.’
    2. 1.2 At a stage in the process of gas or oil extraction and production before the raw material is ready for refining.
      • ‘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.’
      • ‘The country's oil production problem is the poor condition of the upstream oil industry due to many years of neglect and the major investment and time required to boost production.’
      • ‘They produced a report on the safety of the upstream pipeline.’
      • ‘The company's annual output also now establishes it as Canada's second-largest upstream producer.’
      • ‘Project investment in the upstream sector, covering activities from oil exploration to production, takes up the largest portion.’
      • ‘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.’