WordReference Random House Learner's Dictionary of American English © 2026
-ation, suffix. -ation is attached to some verbs or adjectives
WordReference Random House Unabridged Dictionary of American English © 2026- (some of which end in -ate) to form nouns, with the meaning "state or process of'': starve + -ation → starvation (= condition of starving);
separate + -ation → separation (= state of being separate).
-ation,
- a combination of -ate 1 and -ion, used to form nouns from stems in -ate 1 (separation);
on this model, used independently to form nouns from stems of other origin:starvation.
- Latin -ātiōn- (stem of -ātiō), equivalent. to -ā- stem vowel + -tiōn- -tion
Collins Concise English Dictionary © HarperCollins Publishers::
'-ation' also found in these entries (note: many are not synonyms or translations):
avionics
- classification
- halation
- -ion
- speciation
- -tion
- accelerogram
- accelerograph
- accelerometer
- acceptation
- acculturation
- acculturize
- actualization
- admiration
- adoration
- affixation
- alienist
- alimentation
- alkylation
- alteration
- amalgamation
- amortization
- argumentation
- aromatization
- arpeggiation
- assentation
- assignation
- attestation
- augmentation
- authorization
- automation
- aviation
- aviophobia
- backwardation
- bination
- botheration
- calcification
- canalization
- capitalization
- capitation
- carbonatation
- carbonization
- carboxylation
- carnation
- cavitation
- cementation
- centralization
- cerebrate
- chaptalization
- civilization