Question

Whats is the definition of oxymoran

Answer 1

In simple terms it’s a figure of speech that portrays self contradiction.

OR

An oxymoron is a rhetorical device that uses an ostensible self-contradiction to illustrate a rhetorical point or to reveal a paradox.

For example: you can have
“Open secret or big baby”

Answer 2

An oxymoron is a figure of speech, usually one or two words, in which seemingly contradictory terms appear side by side. This contradiction is also known as a paradox.