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Definition of a- prefix from the Oxford Advanced Learner's Dictionary

a-

prefix

/eɪ/

/eɪ/

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(in nouns, adjectives and adverbs) not; without
- atheist
- atypical
- asexually
More Like This Prefixes
Prefixes
- a-
- ante-
- anti-
- be-
- co-
- de-
- demi-
- dis-
- en-
- ex-
- extra-
- hyper-
- hypo-
- il-
- in-
- infra-
- inter-
- intra-
- mis-
- non-
- off-
- oft-
- out-
- over-
- para-
- post-
- pre-
- pro-
- re-
- retro-
- semi-
- sub-
- trans-
- ultra-
- un-
- under-
- up-
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See a- in the Oxford Advanced American Dictionary

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