Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adv. In, at, or toward the source of a stream: paddling upstream.
  • adj. In a direction opposite to that of a stream's current: upstream traffic.
  • adj. Business Closer to the point of production or manufacture than to the point of sale.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. in a direction against the flow of a current or stream; upriver
  • adj. involving exploration and pre-production rather than refining and selling
  • adj. in the direction from the client to the server
  • adj. towards the leading end (5'end) of a DNA molecule
  • adv. against the current

from the GNU version of the Collaborative International Dictionary of English

  • adv. Toward the higher part of a stream; against the current.

from The Century Dictionary and Cyclopedia

  • To stream, flow, or flame up: as, upstreaming flames.
  • Toward the higher part of a stream; against the current: as, to row up-stream.
  • Of or pertaining to the upper part of a stream; moving against the current.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adv. toward the source or against the current
  • adj. in the direction against a stream's current

Etymologies

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