a. To cause to be different: change the spelling of a word.
b. To give a completely different form or appearance to; transform: changed the yard into a garden.
2. To give and receive reciprocally; interchange: change places.
3. To exchange for or replace with another, usually of the same kind or category: change ones name; a light that changes colors.
4.
a. To lay aside, abandon, or leave for another; switch: change methods; change sides.
b. To transfer from (one conveyance) to another: change planes.
5. To give or receive the equivalent of (money) in lower denominations or in foreign currency.
6. To put a fresh covering on: change a bed; change the baby.
v.intr.
1. To become different or undergo alteration: He changed as he matured.
2. To undergo transformation or transition: The music changed to a slow waltz.
3. To go from one phase to another, as the moon or the seasons.
4. To make an exchange: If you prefer this seat, Ill change with you.
5. To transfer from one conveyance to another: She changed in Chicago on her way to the coast.
6. To put on other clothing: We changed for dinner.
7. To become deeper in tone: His voice began to change at age 13.
n.
1. The act, process, or result of altering or modifying: a change in facial expression.
2. The replacing of one thing for another; substitution: a change of atmosphere; a change of ownership.
3. A transformation or transition from one state, condition, or phase to another: the change of seasons.
4. Something different; variety: ate early for a change.
5. A different or fresh set of clothing.
6.
a. Money of smaller denomination given or received in exchange for money of higher denomination.
b. The balance of money returned when an amount given is more than what is due.
c. Coins: had change jingling in his pocket.
7. Music
a. A pattern or order in which bells are rung.
b. In jazz, a change of harmony; a modulation.
8. A market or exchange where business is transacted.
Phrasal Verb:
change off
1. To alternate with another person in performing a task.
2. To perform two tasks at once by alternating or a single task by alternate means.
Idioms:
change hands
To pass from one owner to another.
change (ones) mind
To reverse a previously held opinion or an earlier decision.
change (ones) tune
To alter ones approach or attitude.
[Middle English changen, from Norman French chaunger, from Latin cambire, cambre, to exchange, probably of Celtic origin.]
change /tend/ v.changed, changing, changes1 [I;T] to become s.t. different, transform: I changed my life by going back to college, because doing so helped me get a better job.2 [T] to make s.t. different: The painter changed the color from red to green.3 [T] to exchange, switch: The two people changed places with each other.4 [T] to convert money: a. to give or receive an equal amount of money for bills or coins that are smaller: Can you change (or) make change for a $20 bill? Yes, I have two $10s.b. to give one countrys money for an amount of anothers: I changed my dollars into Euros at the bank.5 [I;T] to put on different clothes: I went home and changed from jeans to a suit.||After work, I changed into my jeans.6to change hands: to have a new owner: That store on the corner has changed hands often.7to change ones mind: to think differently: I changed my mind and stayed home instead of going out.
Thesaurus: change v. 1 to modify, adjust, reorganize 2 to modify, alter, turn 3 to reverse, swap infrml.4 a. and b. to exchange. n.1 [C;U] s.t. different, a transformation: There was a change in the weather from sun to rain (change of government, administration).2 [C] an exchange, switch: He removed one painting and replaced it with another, but no one noticed the change.3 [U] coins: I have a pocket full of change; can you give me dollar bills for these quarters?4small change: a small, (syn.) insignificant amount: The cost of operating that expensive car is small change compared with its purchase price.-n.changer.change n. 1 a shift, transition, turn 2 an alteration, revision, swap infrml.
e
nd
/ v. changed, changing, changes 1 [I;T] to become s.t. different, transform: I changed my life by going back to college, because doing so helped me get a better job. 2 [T] to make s.t. different: The painter changed the color from red to green. 3 [T] to exchange, switch: The two people changed places with each other. 4 [T] to convert money: a. to give or receive an equal amount of money for bills or coins that are smaller: Can you change (or) make change for a $20 bill? 
Yes, I have two $10s. b. to give one countrys money for an amount of anothers: I changed my dollars into Euros at the bank. 5 [I;T] to put on different clothes: I went home and changed from jeans to a suit.||After work, I changed into my jeans. 6 to change hands: to have a new owner: That store on the corner has changed hands often. 7 to change ones mind: to think differently: I changed my mind and stayed home instead of going out.
nj)
re, to exchange, probably of Celtic origin.]