BCD Definition & Meaning - Merriam-Webster

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BCD 1 of 2

noun

ˌbē-(ˌ)sē-ˈdē How to pronounce BCD (audio) : a system of writing numbers in which each decimal digit is represented by its 4-digit binary equivalent 51 in BCD is 0101 0001

BCD

2 of 2

abbreviation

bad conduct discharge

Word History

Etymology

Noun

binary coded decimal

First Known Use

Noun

1959, in the meaning defined above

Time Traveler The first known use of BCD was in 1959 See more words from the same year

Browse Nearby Words

bcc BCD BCE See all Nearby Words

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“BCD.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/BCD. Accessed 10 Dec. 2025.

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