diff --git a/bip-0322.mediawiki b/bip-0322.mediawiki
index d70dc434..c4d50b5e 100644
--- a/bip-0322.mediawiki
+++ b/bip-0322.mediawiki
@@ -46,6 +46,15 @@ Finally, this BIP only addresses the use case where a signer shows they will be
 funds sent to the invoice address. Proving that a signer sent a prior transaction is not possible
 using this BIP.
 
+== Terminology ==
+
+In the context of this BIP, whenever the word "signature" or similar is used, it refers to the
+output of the signing process described below and, depending on the script type of the
+<code>message_challenge</code>, is either a full transaction input witness stack, a full
+transaction, or a PSBT packet that can be validated against a Bitcoin Script Interpreter. Such a
+"signature" may or may not contain an actual cryptographic (ECDSA or Schnorr) signature, depending
+on what is required to satisfy the script corresponding to the <code>message_challenge</code>.
+
 == Types of Signatures ==
 
 This BIP specifies three formats for signing messages: ''legacy'', ''simple'' and ''full''.