- noun the action of enriching the proportion of uranium-235 in nuclear fuel
- noun the increase in nitrogen, phosphorous and carbon compounds or other nutrients in water, especially as a result of a sewage flow or agricultural run-off, which encourages the growth of algae and other water plants.
Cars & Driving
- noun making the air/fuel mixture richer, i.e. increasing the fuel content
- noun the act of adding vitamins, minerals or other nutrients such as milk proteins to food, to make it more nutritious