noun

• The act of moving toward union or uniformity.
• A meeting place.
• The intersection of three electron beams for red, green and blue onto a single pixel in a CRT.
• (mathematics) The process or property of approaching some limiting value.
• (physiology) The coordinated focusing of the eyes, especially at short range.
• (biology) The evolution of similar structures or traits in unrelated species in similar environments; convergent evolution.
• (economics) The hypothesis that poorer economies' per capita incomes tend to grow faster than richer economies.
• The merging of distinct technologies, industries, or devices into a unified whole.