What does cohere mean?
To cohere is to hold together as one — whether physically, logically, or socially. Its most frequent modern use is figurative: ideas, arguments, plots, or policies are said to cohere when their parts fit together consistently and convincingly. A novel whose chapters cohere feels unified rather than fragmentary; an argument that fails to cohere seems muddled. In its literal sense, used especially in science, cohere describes how particles or molecules of the same substance cling to one another, as water droplets do on a windowpane — a phenomenon called cohesion. A third sense applies to groups of people who bond into a united team. The word comes from the Latin cohaerere, meaning 'to stick together'. Formal but widely understood, it is invaluable in academic writing and everyday critique alike, precisely because it captures the difference between a mere collection of parts and something genuinely unified.
verbTo cohere is to stick or hold together firmly as a mass, or — of ideas, arguments, or a group — to be logically or aesthetically consistent and unified.
- (of ideas, plans, arguments, or a text) To be logical, consistent, and well integrated as a whole.
- (of physical substances or particles) To stick or cling together to form a united mass.
- (of people) To unite or bond together as a group.
"The essay's arguments finally began to cohere in the final chapter."
"The scattered notes only began to cohere once she found the connecting thread."
"Wet sand coheres enough to be moulded into shapes."
Cohere and 'coherent' share the same Latin root — so when your ideas cohere, they literally grow coherent.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cohere
Cohere derives from Latin cohaerere, formed from com- ('together') and haerere ('to stick, cling'), the same root behind adhere, inherent, and hesitation-related words. It entered English in the early seventeenth century, borrowed via scholarly use of Latin. Its derivatives — coherence, cohesive, coherently — all carry the core notion of sticking together, whether of matter, thought, or argument.
Related word forms
How cohere is actually used
Register: formal to neutral; common in academic writing, criticism, and science. The figurative sense (ideas cohering) dominates modern usage. In physics, 'cohere' specifically describes like particles bonding to each other, as opposed to 'adhere' (bonding to a different substance).
Easily confused with cohere
Inhere means a quality exists permanently within something ('dangers inhere in the job'), while cohere means things stick together or form a unified whole.