deposition

noun

de·​po·​si·​tion ˌde-pə-ˈzi-shən 

ˌdē-pə-

1

law : out-of-court testimony that is made under oath by a party or witness (as an expert) in response to oral or written questions and that is recorded by an authorized officer for later use in court

gave a videotaped deposition about what she witnessed

also : a meeting at which such testimony is taken

2

: an act or process of laying someone or something down or letting something fall : an act or process of depositing

the deposition of earth and stone by glaciers

3

: something deposited : deposit

Moraines are glacial depositions.

4

: an act of removing from a position of authority : an act of deposing

deposition of a king

depositional

ˌde-pə-ˈzi-sh(ə-)nəl 

ˌdē-pə-

adjective

Synonyms of deposition

• sediment
• deposit
• silt

Examples of deposition in a Sentence

She gave a videotaped deposition about what she saw that night.

His attorneys took depositions from the witnesses.

the deposition of sand and gravel on the river bed

Recent Examples on the Web

Chinese manufacturers have expanded from areas including etching and deposition into ion implantation, inspection and metrology, according to Goldman. — Maria Mocerino, Interesting Engineering, 30 Aug. 2026

But according to records reviewed during a deposition of the park’s director of maintenance, state officials were allegedly unaware that maintenance workers had replaced a wheel on one of the train cars prior to their inspection. — Blake Ellis, CNN Money, 27 Aug. 2026

The exchange became a focus of Wilson’s deposition last month. — Angelique Brenes, PEOPLE, 26 Aug. 2026

Kopin has been investing in AI assisted automation for several years now and our new OLED deposition line is almost fully automated. — John Koetsier, Forbes.com, 22 Aug. 2026

Word History

Etymology

see depose

First Known Use

14th century, in the meaning defined at sense 4

Phrases Containing deposition

• atomic layer deposition

Rhymes for deposition

• abolition
• acquisition
• admonition
• ammunition
• apparition
• apposition
• coalition
• competition
• composition
• definition
• deglutition
• demolition

Kids Definition

deposition

noun

de·​po·​si·​tion ˌdep-ə-ˈzish-ən 

ˌdē-pə-

1

: the act of removing a person from high office

the deposition of the king

2

: a statement especially in writing made under oath

3

: the action or process of depositing

the deposition of silt by a stream

4

: something deposited : deposit

depositional

-ˈzish-nəl 

-ən-ᵊl

adjective

Medical Definition

deposition

noun

de·​po·​si·​tion ˌdep-ə-ˈzi-shən  ˌdē-pə- 

1

: a process of depositing something

the deposition and clearance of a metabolic product

2

: something deposited : deposit

beta-amyloid depositions in Alzheimer's disease

Legal Definition

deposition

noun

de·​po·​si·​tion ˌde-pə-ˈzi-shən 

1

a

: a statement that is made under oath by a party or witness (as an expert) in response to oral examination or written questions and that is recorded by an authorized officer (as a court reporter)

broadly : affidavit

b

: the certified document recording such a statement compare interrogatory

2

: the hearing at which a deposition is made

the deposition takes place where the deponent answers the questions

—Federal Rules of Civil Procedure Rule 30(b)(4)

Note: A deposition can be used as a method of discovery, to preserve the testimony of a witness who is likely to become unavailable for trial, or for impeachment of testimony at trial. Depositions are distinguished from affidavits by the requirement that notice and an opportunity to cross-examine the deponent must be given to the other party.

Etymology

Late Latin depositio testimony, from Latin, act of depositing, from deponere to put down, deposit