1 definition by Anonymous Denial

Sidius - Proceeding in a gradual, subtle way, but with extraordinary effects.

The opposite of "insidious", but with a more conceptual meaning than "sidious". The product of philosophers interfering with the English language.

Relentless, skilled, creative.

Not to be confused with "Darth Sideous" from Star Wars, the rapper "Sidius", or the design firm "Sidius".
Bro, that author of The Fountainhead was so sidius. Her book continues to have a positive influence even after 70 years!
by Anonymous Denial April 18, 2022
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