English Reference
verb · noun

convert

v. · n.
US /ˈkɑnvɝt/ con·vert UK spelling converting, converts

  1. 01 B1 Intermediate

    v.to change something so that it has a different form or a new purpose.

    v.to transform the physical state, function, or character of an object or system.

    Simple

    They decided to convert the old warehouse into a modern apartment building.

    In context

    The developers plan to convert the decommissioned power station into a multi-use cultural hub while preserving its industrial facade.

    Usage

    Often used with the preposition 'into'.

  2. 02 B2 Upper Intermediate Religion

    v.to change your religion or your main beliefs, or to persuade someone else to do so.

    v.to induce a change in an individual's religious affiliation, political ideology, or core belief system.

    Simple

    He decided to convert to Buddhism after traveling through Southeast Asia.

    In context

    Missionaries spent decades attempting to convert the local population to their faith through education and community outreach.

    Usage

    Intransitive use typically takes the preposition 'to'.

    proselytizepersuade
  3. 03 B1 Intermediate Math

    v.to change a value from one system of measurement or money to another.

    v.to express a quantity or value in alternative units or a different currency.

    Simple

    You can use this app to convert kilometers into miles quickly.

    In context

    The accounting software automatically converts all foreign transactions into the company's functional currency using the daily spot rate.

  4. 04 B2 Upper Intermediate Sport

    v.to successfully score a goal or point, especially from a penalty or a specific opportunity.

    v.to successfully complete a scoring opportunity, such as a penalty kick or an extra point after a touchdown.

    Simple

    The striker managed to convert the penalty in the final minute of the game.

    In context

    The team failed to convert several crucial power-play opportunities, which ultimately cost them the championship title.

  5. 05 B2 Upper Intermediate

    n.someone who has changed their religion or their strong opinion about something.

    n.an individual who has adopted a new set of religious beliefs or has been persuaded to support a previously opposed cause.

    Simple

    As a recent convert to veganism, she was eager to share new recipes with her friends.

    In context

    The political party gained many new converts following the announcement of their innovative economic platform.

    Teacher's tip

    Note the stress shift: the verb is con-VERT /kənˈvɜːrt/ and the noun is CON-vert /ˈkɒnvɜːrt/.

    Pitfall
    He is a convert of Islam. He is a convert to Islam.

    Use the preposition 'to' when identifying the new belief system of a convert.

    proselyteneophytebeliever
    apostaterenegade

Usage convert to

Using inexpensive silicon-based detectors, the system quickly converts near-infrared light to visible light while producing clearer images through these difficult environments.

Phys.org· 17 Aug 2026

Esther/Little Bird is punishingly self-reliant, being barely accepted by her Jewish in-laws, despite converting at a young age.

The Guardian· 15 Aug 2026

Etymology tree Proto-Indo-European *ḱe Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Proto-Indo-European *wert- Proto-Indo-European *wértetor Proto-Italic *wertō Proto-Italic *komwertō Latin convertōder. Old French convertirbor. Middle English converten English convert From Middle English converten, from Old French convertir, from Latin converto (“turn around”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Latin converto
Level B2 · Upper Intermediate
Frequency Common
Updated