Upstream

adv. toward or in the higher part of a stream; against the current; in a manner which is contrary to the norm

adj. in the higher part of a stream, closer to the source of the stream

In geography, upstream means literally towards the source of a stream or river, or against the normal direction of water flow. By analogy with this, see also:Molecular biologyUpstream on DNA, determining relative positions on DNA.Upstream in signal transduction, determining temporal and mechanistic order of cellular and molecular events of signal transduction.upstream (computer science).upstream (oil industry).Upstream emission factor.upstream (bioprocess).upstream (marketing).
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Adjective
1. in the direction against a stream's current
(antonym) downstream
Adverb
1. toward the source or against the current
(synonym) upriver
(antonym) downriver, downstream
2. against the current; "he swam upstream"

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

1. The direction opposite the data flow. 2. With respect to the flow of data in a communications path: at a specified point, the direction toward which data are received earlier than at the specified point.