diff --git a/assoc-list.md b/assoc-list.md
new file mode 100644
index 0000000..20af355
--- /dev/null
+++ b/assoc-list.md
@@ -0,0 +1 @@
+An association list, being a list each of whose elements is a pair, where in each pair the first element is deemed to be the key and the second the value of that key.
\ No newline at end of file