Definition

1. Noun:
   • A group of people sharing a common statistical or demographic characteristic: A cohort is a group of individuals who share a particular characteristic, most commonly age, over a period of time, especially in a study.
   • A companion or associate: A cohort can refer to a supporter, companion, or associate, often implying a close or loyal relationship.
   • (Historical) A band of warriors, especially in ancient Rome: Originally, a cohort was a military unit in the Roman army, one-tenth of a legion.

Usage Examples

• Noun (Statistical Group):
  • The study followed a cohort of children born in 1990.
  • She is part of the cohort of students who graduated during the recession.
• Noun (Companion/Associate):
  • The CEO arrived with his usual cohort of advisors.
  • He and his cohorts were known for their disruptive ideas.
• Noun (Historical Military Unit):
  • The Roman legion was divided into ten cohorts.

Advanced Usage

• In epidemiology and social science: A cohort study observes a defined group (cohort) over time to analyze outcomes related to a specific factor.
  • The researchers conducted a cohort study on the effects of diet.
• Used informally, sometimes with a negative connotation: Can imply a group of followers or accomplices.
  • The politician and his cohorts were accused of corruption.

Variants and Related Words

• Cohort analysis (n): A subset of behavioral analytics that takes data from a given dataset and breaks it into related groups for analysis.
• Cohort effect (n): The influence of shared life experiences on a group born at a similar time.

Synonyms

• Group (for the statistical sense):
• Band (for the associate sense, often informal):
• Contingent:
• Companion:

Related Phrases

• Age cohort: A group of people born during the same time period.
  • Marketing strategies often target specific age cohorts.
• Peer cohort: A group of individuals of similar status or age.
  • Children are highly influenced by their peer cohort.

Noun

1. a group of people having approximately the same age
2. a band of warriors (originally a unit of a Roman Legion)
3. a company of companions or supporters