What does coding mean?
Coding is the practice of writing instructions that a computer can execute, using a formal programming language such as Python, JavaScript, or C++. It sits at the heart of modern technology: every website, app, game, and digital service exists because someone wrote its code. Beyond computing, the word also denotes any systematic method of representing information with symbols — as in the genetic coding carried by DNA or the coding schemes used in data transmission. The term derives from 'code', which originally meant a body of law, later extending to cipher systems and finally to machine instructions. Today, coding carries strongly positive connotations of skill and creativity, and phrases like 'learn to code' reflect a widespread belief that programming literacy is a valuable, even essential, modern competence. It is standard in both British and American English, informal enough for everyday speech yet precise enough for technical contexts.
The activity or process of writing computer programs in a programming language.
"He taught himself coding through free online tutorials."
A system of symbols, characters, or conventions used to represent or translate information.
"The genetic coding embedded in DNA directs the synthesis of proteins."
This older, broader sense predominates in scientific and technical registers such as genetics, linguistics, and information theory.
Rarely used; 'coding' usually functions as an uncountable mass noun referring to the activity or system in general.
"Different character codings can represent the same text in incompatible ways."
The word 'coding' once meant little more than filing laws into tidy legal 'codes' — and today it describes the invisible language running nearly everything you touch.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of coding
'Coding' is a derivative of 'code', which entered English from French 'code', ultimately from Latin 'codex' — originally meaning a trunk or tablet, then a bound manuscript book, and by extension a systematic collection of laws (as in Justinian's Codex). From legal codes the word extended metaphorically to any system of signs, giving rise to ciphers and, in the twentieth century, to machine-readable instructions. The gerund form 'coding' thus shares its root with words like 'codify' and 'codicil', all tracing back to Latin 'codex'. Its application to computer programming became widespread only after mid-twentieth-century computing.
Related word forms
How coding is actually used
In everyday and professional contexts, 'coding' most often refers specifically to the act of writing software. In scientific fields such as biology and information theory it retains an older, broader sense: any systematic use of symbols to represent information. The gerund/verbal sense ('she is coding') functions grammatically like a noun derived from the verb 'to code'.
Easily confused with coding
Cording refers to cords or corded fabric/textures (or making cords), whereas coding refers either to writing computer programs or to systems of symbolic representation.
Codding means catching cod fish (or teasing, in dialect), while coding is writing computer programs or assigning codes.