Real Dictionary

convert
countable noun: A convert is someone who has changed their religious or political beliefs.
countable noun: If you describe someone as a convert to something, you mean that they have recently become very enthusiastic about it.
verb: If one thing is converted or converts into another, it is changed into a different form.
verb: If someone converts a room or building, they alter it in order to use it for a different purpose.
verb: If someone converts you to something, they make you very enthusiastic about it.
verb: If someone converts you, they persuade you to change your religious or political beliefs. You can also say that someone converts to a different religion.
verb: If you convert a quantity from one system of measurement to another, you calculate what the quantity is in the second system.
verb: If you convert a vehicle or piece of equipment, you change it so that it can use a different fuel.

convert in American English
to change from one form or use to another; transform

convert in American English 1
intransitive verb: to become converted
noun: one who has been converted, as to a religion or opinion
transitive verb: to change (something) into a different form or properties; transmute; transform

convert in American English 2
noun: a convertible automobile

convert in British English
noun: a person who has been converted to another belief, religion, etc
verb: to change or adapt the form, character, or function of; transform