diff --git a/docs/concepts/GLOSSARY.md b/docs/concepts/GLOSSARY.md
index ee899ce..ad7ab59 100644
--- a/docs/concepts/GLOSSARY.md
+++ b/docs/concepts/GLOSSARY.md
@@ -68,7 +68,7 @@ A compiled GPU configuration bundling: [[vertex shader]](#vertex-shader) + [[fra
 
 ## Polltype
 
-The strategy passed to `device.poll()`, which processes all completed GPU commands and optionally waits for new work. `PollType::Poll` is non-blocking: it checks for completed work once and returns immediately. `PollType::Wait { timeout }` blocks the calling thread for up to the specified `Duration`; passing `None` as the timeout blocks indefinitely. For the rainbow triangle, `Wait` with a short timeout is correct: we need the GPU to finish the frame before requesting the next surface texture.
+The strategy passed to `device.poll()`, which processes all completed GPU commands and optionally waits for new work. `PollType::Poll` is non-blocking: it checks for completed work once and returns immediately. `PollType::Wait { submission_index, timeout }` can optionally block until a specific command submission completes (via `submission_index: Option<T>`) or until a duration elapses (via `timeout: Option<Duration>`); passing `None` for both blocks indefinitely. For the rainbow triangle, `Wait` with a short timeout is correct: we need the GPU to finish the frame before requesting the next surface texture.
 
 ## Present Mode