diff --git a/src/textual/app.py b/src/textual/app.py
index 4883d76d54..29153a738e 100644
--- a/src/textual/app.py
+++ b/src/textual/app.py
@@ -3387,7 +3387,7 @@ def notify(
             message: The message for the notification.
             title: The title for the notification.
             severity: The severity of the notification.
-            timeout: The timeout for the notification.
+            timeout: The timeout (in seconds) for the notification.
 
         The `notify` method is used to create an application-wide
         notification, shown in a [`Toast`][textual.widgets._toast.Toast],
diff --git a/src/textual/notifications.py b/src/textual/notifications.py
index 27f95ccd6d..2b2489bfbf 100644
--- a/src/textual/notifications.py
+++ b/src/textual/notifications.py
@@ -37,7 +37,7 @@ class Notification:
     """The severity level for the notification."""
 
     timeout: float = 5
-    """The timeout for the notification."""
+    """The timeout (in seconds) for the notification."""
 
     raised_at: float = field(default_factory=time)
     """The time when the notification was raised (in Unix time)."""
diff --git a/src/textual/widget.py b/src/textual/widget.py
index e1ac7e2b26..6889090f1b 100644
--- a/src/textual/widget.py
+++ b/src/textual/widget.py
@@ -3791,7 +3791,7 @@ def notify(
             message: The message for the notification.
             title: The title for the notification.
             severity: The severity of the notification.
-            timeout: The timeout for the notification.
+            timeout: The timeout (in seconds) for the notification.
 
         See [`App.notify`][textual.app.App.notify] for the full
         documentation for this method.