- 1to suggest or accept that something is true so that it can be used as the basis for a theory, etc. synonym posit
- 2 They postulated a 500-year lifespan for a plastic container.
NAmE//ˈpɑstʃəˌleɪt//postulate something postulate that… (formal)Verb Forms present simple I / you / we / they postulate
he / she / it postulates
past simple postulated
-ing form postulating