English Reference
Noun

CDR

n. countable
C1 Advanced cdr Electronics Finance Military Programming

n.Stands for Compact Disc Recordable. A type of disc that you can use to save music, photos, or documents from a computer one time.

n.Abbreviation for Compact Disc Recordable. A digital optical disc storage format that allows data to be written once and read multiple times using a laser.


SIMPLE

I saved my old photos onto a CDR.

CONTEXTUAL

Before cloud storage became popular, many people used a CDR to back up their important computer files.

COMPLEX

The transition from magnetic tape to CDR technology allowed for faster data access and more durable long-term storage of digital archives during the late nineties.

Usage

Often written with a hyphen as CD-R; functions as a countable noun when referring to the physical disc.

The report emphasizes that net-zero is a milestone toward net-negative, with CDR needed in addition to, not instead of, sustained reductions in greenhouse gas emissions.

Phys.org· 2 Sept 2026
This entry
Level C1 · Advanced
Frequency Occasional
Updated