connection (Noun) — A relation between things or events (as in the case of one causing the other or sharing features with it). ex. "there was a connection between eating that pickle and having that nightmare"
connection (Noun) — The state of being connected. ex. "the connection between church and state is inescapable"
connection (Noun) — Something that connects things together. ex. "he soldered the connection"
connection (Noun) — (usually plural) a person who is influential and to whom you are connected in some way (as by family or friendship). ex. "he has powerful connections"
connection (Noun) — The process of bringing ideas or events together in memory or imagination. ex. "conditioning is a form of learning by connection"
connection (Noun) — A connecting shape.
connection (Noun) — A supplier (especially of narcotics).
connection (Noun) — Shifting from one form of transportation to another. ex. "the plane was late and he missed his connection in Atlanta"
connection (Noun) — The act of bringing two things into contact (especially for communication). ex. "there was a connection via the internet"