What does undirected mean?
Undirected means that something has no specified direction or has not been guided toward a particular outcome. The term is especially common in mathematics and computer science: an undirected graph consists of connections without an inherent orientation, so an edge can be traversed in either direction. It is also used more generally for activity, communication, emotion, or effort that lacks a definite aim or course. Saying that an interview was undirected, for example, suggests that it was open-ended rather than tightly structured around predetermined questions. Although undirected can sometimes suggest carelessness or aimlessness, its technical use is neutral and simply denotes the absence of direction. It is a precise and useful alternative to less formal wording such as directionless, especially when describing systems, relationships, or processes whose orientation is being considered.
adjectiveNot directed; lacking direction, orientation, or a guiding purpose. In graph theory, an undirected graph or edge has no inherent orientation.
- Not directed; lacking a specified course, orientation, or guiding intention.
- Having no orientation in the mathematical sense; used of graph edges and networks whose connections can be traversed without an inherent direction.
"Her reply felt undirected, offering no clear next step."
"The candidates were given an undirected interview in which they could discuss their experience in their own way."
"Each undirected edge in the graph represents a two-way connection between two vertices."
An undirected graph treats every road as two-way—until you draw an arrow.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does undirected come from?
Undirected was formed in English by combining the negative prefix un- with directed. Directed ultimately derives from Latin directus, the past participle of dirigere, meaning “to lead” or “direct.” The same Latin foundation produced related English words such as direction, directive, and director, while redirect was formed by adding another prefix to the same base.
How undirected is actually used
Common in formal and technical prose. In everyday discussion, directionless or unfocused may sound more natural. In graph theory, undirected is a precise term contrasting with directed and does not imply that the graph is random.
Easily confused with undirected
Undirected is normally an adjective meaning not directed, whereas undirect is a rare verb meaning to direct or guide.