Definition of "change" in English

verb

(intransitive) To become something different.
- The tadpole changed into a frog.
- Stock prices are constantly changing.
(transitive, ergative) To make something into something else.
- The fairy changed the frog into a prince.
- I had to change the wording of the ad so it would fit.
(transitive) To replace.
- Ask the janitor to come and change the lightbulb.
- After a brisk walk, I washed up and changed my shirt.
(intransitive) To replace one's clothing.
- You can't go into the dressing room while she’s changing.
- The clowns changed into their costumes before the circus started.
(transitive) To replace the clothing of (the one wearing it), especially to put a clean diaper on (someone).
- It’s your turn to change the baby.
(intransitive) To transfer to another vehicle (train, bus, etc.)
(archaic) To exchange.
- I would give any thing to change a word or two with this person.
(transitive) To change hand while riding (a horse).
- to change a horse

noun

(countable, uncountable) The process of becoming different.
- The product is undergoing a change in order to improve it.
(uncountable) Small denominations of money given in exchange for a larger denomination.
- Can I get change for this $100 bill, please?
(countable) A replacement.
- a change of clothes
(uncountable) Balance of money returned from the sum paid after deducting the price of a purchase.
- A customer who pays with a 10-pound note for a £9 item receives one pound in change.
(uncountable) An amount of cash, usually in the form of coins, but sometimes inclusive of paper money.
- Do you have any change on you? I need to make a phone call.
- This bus ride requires exact change.
(countable) A transfer between vehicles.
- The train journey from Bristol to Nottingham includes a change at Birmingham.
(baseball) A change-up pitch.
(campanology) Any order in which a number of bells are struck, other than that of the diatonic scale.