An expectation is a belief about what might happen in the future, like your expectation to stay close with your best friends your whole life. Expectation definition: Your expectations are your strong hopes or beliefs that Century () What are your expectations with regards to cleaning the flat?. Expectation definition, the act or the state of expecting: to wait in expectation. Now is that what the gleam and expectation of a future life does for you?. Word Origin and History for expectation Expand. An example of expectation is a belief that you will be getting promoted. One-star words are frequent, two-star words are more frequent, and on the run online words are the most frequent. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning. Britling Sees It Through H. I think she had unrealistic expectations of motherhood. Origin of expectation Expand.