Definition of "upthrust"

upthrust

noun
countable and uncountable, plural upthrusts
1. An upward thrust.
2. (nautical) Buoyancy.
3. (geology) An upward movement of part of the Earth's crust.
verb
third-person singular simple present upthrusts, present participle upthrusting, simple past and past participle upthrusted
1. (transitive) To thrust something upwards.
2. (intransitive) To be thrust upwards.