(epistemology, countable) A circle of (foundational) epistemic arguments where the reliability of a device used within this circle is also proven within the circle.

circularly polarized light

(idiomatic) A political party or other group experiencing considerable disarray because the members are engaging in internal disputes and mutual recrimination.

plural of circular firing squad

In a circular way.

(physics) Light (or other electromagnetic radiation) whose electric or displacement vector rotates in a plane perpendicular to the propagation direction with constant angular velocity

Third-person singular simple present indicative form of circularise

present participle of circularise

simple past tense and past participle of circularise

Non-Oxford British English standard spelling of circularize.