DOC added undefined behavior of partial_fit to glossary
@@ -1272,6 +1272,8 @@ Methods
To clear the model, a new estimator should be constructed, for instance
with :func:`base.clone`.
+ NOTE: Using ``partial_fit`` after ``fit`` results in undefined behavior.
+
``predict``
Makes a prediction for each sample, usually only taking :term:`X` as
input (but see under regressor output conventions below). In a
