# uplink

/ˈəˌpɫɪŋk/ (US) · CEFR C1 · Noun

Source: https://englishreference.com/word/uplink
Updated: 2026-05-30

## Definition

a connection that sends data from a smaller device or a ground station to a larger system, like a satellite. It is the opposite of a downlink, which sends data back down.

For teachers: a communication link that transmits data from a ground-based station or a smaller device to a satellite or a central server. Often contrasted with a downlink, which carries data in the reverse direction.

## Examples

- The satellite lost its uplink during the storm.
- Engineers monitored the uplink to ensure the satellite received the updated software instructions from the control center.
- Maintaining a stable uplink is critical for real-time data transmission, as any latency or signal degradation can compromise the integrity of the entire communication network.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.