Definition of cohesion
1 : the act or state of sticking together tightly; especially : unity <the lack of cohesion in the Party — The Times Literary Supplement (London)> <cohesion among soldiers in a unit>
2 : union between similar plant parts or organs
3 : molecular attraction by which the particles of a body are united throughout the mass
cohesionlessplay \-ləs\ adjective
Examples of cohesion in a sentence
There was a lack of cohesion in the rebel army.
Did You Know?
Cohesion is one of the noun forms of cohere; the others are cohesiveness and coherence, each of which has a slightly different meaning. Coherence is often used to describe a person's speech or writing. An incoherent talk or blog post is one that doesn't "hang together;" and if the police pick up someone who they describe as incoherent, it means he or she isn't making sense. But to describe a group or team that always sticks together, you would use cohesive, not coherent. And the words you'd use in Chemistry class to describe the way molecules hang together—for example, the way water forms into beads and drops—are cohesion, cohesive, and cohesiveness.
Origin and Etymology of cohesion
Latin cohaesus, past participle of cohaerēre —see cohere
First Known Use: 1660
COHESION Defined for English Language Learners
Definition of cohesion for English Language Learners
: a condition in which people or things are closely united
COHESION Defined for Kids
Definition of cohesion for Students
1 : the action of sticking together
2 : the force of attraction between the molecules in a mass
Seen and Heard
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