Which term best describes a critical moment where two things meet or join?

The term that best describes a critical moment where two things meet or join is "juncture." A juncture refers to a point in time or space where distinct elements converge or come together, signifying significance in the process or event. This concept is often used in various contexts, such as in discussions about decision-making, timeline events, or physical points where paths meet.

In contrast, "separation" implies a breaking apart, which does not convey the idea of meeting or joining. "Division" suggests a splitting or fragmenting, further reinforcing the notion of separating rather than uniting. "Intersection," while also indicating a meeting point, typically refers more specifically to paths or roads crossing each other, which may not encompass the broader context of critical moments as effectively as "juncture." Thus, "juncture" captures the essence of a significant joining moment succinctly.