convert (in)to (something)

1. To leave one religion in order to follow another. I converted to Judaism in preparation for my wedding. I'm not ready to convert to Catholicism, even though my serious girlfriend is Catholic. Though I was raised Catholic, I converted to Hinduism after studying yoga extensively in India.

2. To cause someone to leave one religion in order to follow another. In this usage, a noun or pronoun is used between "convert" and "(in)to." Everyone thinks Mandy converted me to Catholicism, but that's not really true. I'm wary of spiritual teachers who are very pushy about converting people to their religion. I think a gifted priest can convert people to Catholicism by making the Biblical stories really come alive.

3. To change or transform from one form, state, or function into another. The gas will convert into a liquid with enough pressure. This sofa converts to a pretty comfy bed. Wait, it's a full ballgown that converts into shorter dress for the reception? OK, I'm intrigued.

4. To change or transform something to a new or different form, state, or function. In this usage, a noun or pronoun is used between "convert" and "from." The alchemist tried for years to convert lead and other common minerals into gold. Could you convert these American dollars to euros for me, please? Can you help me convert the sofa into a bed? I think something is stuck.

5. To shift from one type of person or thing into another. Did the shy kid I used to know really convert into a punk rock singer? Over the next few years, the small two-man operation converted to one of the largest businesses in the country. Did that kid really just sass me? Wow, he's sure converted into a brat since the last time I saw him.

6. To cause someone or something to change or shift from one type of person or thing into another. In this usage, a noun or pronoun is used between "convert" and "from." The profession converted him over time from a trusting, open-minded young man into a bitter, cynical old grouch. The oppressive regime converted the country into a cruel police state. If you convert this kid into a utility player, he might just have a path to the major leagues. Only the most elite talents can get away with playing only one position these days.