(1):

(n.) An assembly; a gathering formed by a voluntary or spontaneous moving and meeting in one place.

(2):

(n.) A moving, flowing, or running together; confluence.

(3):

(n.) The place or point of meeting or junction of two bodies.

(4):

(n.) An open space where several roads or paths meet; esp. an open space in a park where several roads meet.

(5):

(n.) Concurrence; cooperation.