pseudo- Syllabification: (pseudo-) (also pseud- before a vowel)Definition of pseudo- combining form 1supposed or purporting to be but not really so; false; not genuine:pseudonym pseudoscience 2resembling or imitating:pseudohallucination pseudo-FrenchOrigin:from Greek pseudēs 'false', pseudos 'falsehood'pseudo- in other Oxford dictionaries Definition of pseudo- in the British & World English dictionary