What does discontiguous mean?
Discontiguous is an adjective describing things that do not touch or form an unbroken whole — whether physically separated pieces of land, or segments of data scattered across a computer's memory or storage. It is the direct negative of "contiguous," which means sharing a boundary or being in uninterrupted sequence. The word appears most often in technical contexts: programmers speak of discontiguous memory allocations when data must be pieced together from non-adjacent locations, and spreadsheet users select discontiguous ranges by holding down a modifier key to highlight cells that are not next to one another. It also serves in political and legal prose to describe territories that belong to one state yet are divided by other jurisdictions — Alaska and the lower forty-eight states of the United States are a familiar example of a discontiguous country. Formal rather than colloquial, discontiguous offers precision where looser words like "separate" or "broken up" would blur exactly what kind of separation is meant.
adjectiveNot contiguous; not touching or sharing a common border, or occurring in separate, non-adjacent parts rather than as a continuous whole.
- Of places or areas: not touching or sharing a common boundary.
- Of data structures, memory, or sequences: consisting of parts stored or arranged separately rather than consecutively.
"The company's offices were spread across several discontiguous buildings on opposite sides of the river."
"The empire's territory was discontiguous, with provinces separated by hundreds of miles of foreign land."
"The file was fragmented into discontiguous clusters across the hard drive, slowing read times considerably."
When your computer says it needs 'contiguous' disk space, it's complaining that the free blocks are discontiguous — the same word that describes empires split by rival borders.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of discontiguous
Discontiguous derives from the Latin adjective contiguus, meaning "touching" or "bordering upon", formed from the verb contingere, "to touch or be in contact", itself built from com- ("together") and tangere ("to touch"). The prefix dis-, expressing negation or reversal, was added in English to produce the sense of "not touching". It thus belongs to a large family of English words descended from tangere, including contact, tangent, contingent, and contiguous itself. The word entered formal English usage alongside its positive counterpart and remains comparatively rare outside technical registers.
Related word forms
How discontiguous is actually used
Formal and technical in register. It is especially common in computing (memory allocation, disk fragmentation) and in legal or political writing about territories. In everyday speech, "not adjacent" or "separated" is more natural.
Easily confused with discontiguous
"Discontinuous" means broken or interrupted at intervals, while "discontiguous" specifically means lacking physical contact or adjacency between parts.