diff --git a/doc/sandbox.mdwn b/doc/sandbox.mdwn
index 0d04b858a..a224501ec 100644
--- a/doc/sandbox.mdwn
+++ b/doc/sandbox.mdwn
@@ -76,4 +76,5 @@ This sandbox is also a [[blog]]!
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 [[newpage]]
 ---
-random
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+random, n.: unpredictable based on previous information. Computers tend to make do with nonrandom 
+or pseudorandom computations. See also: arbitrary, deterministic.
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