- 1 dampen something to make something slightly wet Perspiration dampened her face and neck. He dampened his hair to make it lie flat.
- 2dampen something to make something such as a feeling or a reaction less strong None of the setbacks could dampen his enthusiasm for the project. She wasn't going to let anything dampen her spirits today.
NAmE//ˈdæmpən//Verb Forms present simple I / you / we / they dampen
he / she / it dampens
past simple dampened
-ing form dampening