diff --git a/README.md b/README.md
index 4e40cae..c1588e0 100644
--- a/README.md
+++ b/README.md
@@ -272,7 +272,8 @@ Here are a few examples of ranges and whether they are valid:
 ### Overlap
 
 Two ranges are "overlapping" if there exists a point that is contained
-within both ranges.
+within both ranges. For example, `2..4` and `2..6` overlap but `2..4`
+and `4..8` do not.
 
 ### Touching
 
diff --git a/src/lib.rs b/src/lib.rs
index a18d487..f0bc278 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -275,7 +275,8 @@ along with discrete_range_map. If not, see <https://www.gnu.org/licenses/>.
 //! ### Overlap
 //!
 //! Two ranges are "overlapping" if there exists a point that is contained
-//! within both ranges.
+//! within both ranges. For example, `2..4` and `2..6` overlap but `2..4`
+//! and `4..8` do not.
 //!
 //! ### Touching
 //!