CD

1 of 2

noun (1)

ˌsē-ˈdē 

: certificate of deposit

CD

2 of 2

noun (2)

: a small optical disk usually containing recorded music or computer data

also : the content (such as music or a computer program) of a CD released as a unit

promoting her latest CD

Examples of CD in a Sentence

Recent Examples on the Web

Noun

Get started with a CD account online today. —Matt Richardson, CBS News, 4 June 2026

The malware devotes considerable attention to CI/CD (continuous integration/continuous delivery) systems, which allow for faster and more reliable software releases by automating the building, testing, and deploying of code changes. —Dan Goodin, ArsTechnica, 1 June 2026

Qobuz now offers 100 million tracks in lossless formats such as CD, hi-res (up to 24-bit/192kHz), DXD and DSD. —Benny Har-Even, Forbes.com, 31 May 2026

Five decades after the LP initially came out, the two officially released the album on streaming services, CD and vinyl. —Andrea Wurzburger, PEOPLE, 26 May 2026

Word History

Etymology

Noun (2)

compact disc

First Known Use

Noun (1)

1866, in the meaning defined above

Noun (2)

1979, in the meaning defined above

Phrases Containing CD

• CD-ROM

Kids Definition

CD

noun

ˌsē-dē

: a small plastic disk on which information (as music or computer data) is recorded digitally and read by using a laser

Medical Definition

cd

1 of 3 abbreviation

candela

Cd

2 of 3 symbol

cadmium

CD

3 of 3 abbreviation

1

cluster of differentiation

—used with a number to denote any of numerous antigenic proteins found chiefly on the surface of white blood cells (such as T cells or B cells) see cd4, cd8

2

communicable disease

3

constant drainage

4

contagious disease

5

convulsive disorder

6

curative dose

Legal Definition

CD

abbreviation

certificate of deposit