supposititious

adjective sup·pos·i·ti·tious \sə-ˌpä-zə-ˈti-shəs\

Definition of SUPPOSITITIOUS

a : fraudulently substituted : spurious

b of a child (1) : falsely presented as a genuine heir (2) : illegitimate

[influenced in meaning by supposition]

b : of the nature of or based on a supposition : hypothetical

— sup·pos·i·ti·tious·ly adverb

Latin suppositicius, from suppositus, past participle of supponere to substitute

First Known Use: 1610

Synonyms: baseborn, bastard, misbegotten, natural, spurious, illegitimate, unfathered

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