- 1[transitive] lather something to cover something with lather I lathered my face and started to shave.
- 2[intransitive] to produce lather Soap does not lather well in hard water.
NAmE//ˈlæðər//Verb Forms present simple I / you / we / they lather
he / she / it lathers
past simple lathered
-ing form lathering