diff --git a/terminology.md b/terminology.md
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--- a/terminology.md
+++ b/terminology.md
@@ -108,6 +108,15 @@ TODO: Describe metrics terminology https://github.com/open-telemetry/opentelemet
 
 ## DistributedContext
 
+**DistributedContext** is an abstract data type that represents collection of entries.
+Each key of **DistributedContext** is associated with exactly one value. **DistributedContext** is serializable,
+to facilitate propagating it not only inside the process but also across process boundaries.
+
+**DistributedContext** is used to annotate telemetry with the name:value pair **Entry**.
+Those values can be used to add dimension to the metric or additional contest properties to logs and traces.
+
+**DistributedContext** is a recommended name but languages can have more language-specific names like **dctx**.
+
 ### Entry
 
 An **Entry** is used to label anything that is associated  with a specific operation,