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diff --git a/adoc/p_2over.adoc b/adoc/p_2over.adoc
index 772d238..fcfc184 100644
--- a/adoc/p_2over.adoc
+++ b/adoc/p_2over.adoc
@@ -1,9 +1,20 @@
+// stack.asm:	WORD p_2over, '2OVER',fasm
+
 anchor:p_2over[]
 
-Word: 2OVER
-----------
+=== Word: 2OVER
+
+....
+Data stack: ( v1 v2 v3 v4 -- v1 v2 v3 v4 v1 v2 )
+....
 
-----
-stack.asm:	WORD p_2over, '2OVER',fasm
-----
+"2OVER" is a function word that replicates the second duble-cell pair
+onto the top of the data stack. This is similar to <<p_over,OVER>> but
+working with cell pairs rather than single cells.
 
+====
+.Definition concept for 2OVER
+****
+( v1 v2 v3 v4 -- v1 v2 v3 v4 v1 v2 ) : 2OVER 3 PICK 3 PICK ;
+****
+====