DOC add `score_samples` to glossary
@@ -1385,7 +1385,11 @@ Methods
often the likelihood of the data under the model.
``score_samples``
- TODO
+ A method that returns a score for each given sample. The exact
+ definition of *score* varies from one class to another. In the case of
+ density estimation, it can be the log density model on the data, and in
+ the case of outlier detection, it can be the opposite of the outlier
+ factor of the data.
If the estimator was not already :term:`fitted`, calling this method
should raise a :class:`exceptions.NotFittedError`.
