What is Hit a Ceiling?
Your growth curve has flattened and the development you once experienced has slowed to a standstill. You're competent in your current role but no longer gaining new ground. A plateau can be a resting point or a ceiling — which it becomes depends on what you do next.
When you might feel hit a ceiling
Hit a Ceiling is a specific form of stuck, which itself is a type of stagnant. You might experience this feeling in situations where stagnant is present, particularly when the circumstances align with the nuances that define hit a ceiling.