0 to (cause something or someone to) change in form or character: --
1 in sport , to score extra points such as a conversion, free throw, or penalty shot --
2 someone who changes their beliefs, habits, or way of living: --
a convert to vegetarianism/wholemeal bread
3 to change the character, appearance, or operation of something: --
5 to change from one type of system or organization to another, or to make something do this: --
You needn't bother telling us how recycling helps the environment, because you're preaching to the converted.
Nitrogen is converted into nitrates in the soil which plants can then use.
The house, a former barn, has been attractively converted.
Those who attempted to convert the heathen were put to death.