Definition

1. Adjective:
   • Having the same boundaries or extent in space, time, or meaning: The term "coterminous" describes things that share a common boundary, are of equal scope, or coincide exactly in duration or application.

Usage

• Spatial Boundaries: Used to describe geographical or political areas that share the same border or are exactly the same in extent.
• Temporal Scope: Used to describe events, periods, or conditions that are exactly equal in duration or that begin and end at the same time.
• Conceptual Scope: Used to describe ideas, definitions, or jurisdictions that are identical in their range or application.

Examples

• Spatial:
  • The city's jurisdiction is coterminous with the county line.
  • The national park is coterminous with the mountain range.
• Temporal:
  • His tenure as CEO was coterminous with the company's most profitable decade.
  • The warranty period is coterminous with the lease agreement.
• Conceptual:
  • In this legal framework, the two terms are coterminous in meaning.
  • The authority of the two agencies is not coterminous; one has a broader mandate.

Advanced Usage

• "to be coterminous with": This is the standard construction, indicating that one thing shares its exact boundaries, duration, or scope with another.
  • The study's timeframe was coterminous with the outbreak of the pandemic.
• Legal/Administrative Context: Frequently used in legal, political, and administrative texts to describe coinciding jurisdictions or powers.
  • The district's electoral boundaries are coterminous with its municipal borders.

Variants and Related Words

• Conterminous (adj): An alternative spelling with the same meaning.
  • The two regions are conterminous.
• Coextensive (adj): Very similar, meaning extending over the same space, time, or scope. Often used interchangeably with "coterminous," though "coextensive" can sometimes imply sharing the same spatial or conceptual area without the strict emphasis on a shared .
  • The professor's interests are coextensive with the field of cognitive science.

Synonyms

• Coincident: Occurring or existing at the same time or place.
• Coextensive: Having the same spatial or conceptual limits.
• Adjacent: Next to or adjoining something else (implies closeness but not necessarily identical boundaries).
• Contiguous: Sharing a common border; touching.

Antonyms

• Separate: Not joined or connected.
• Disparate: Essentially different in kind; not allowing comparison.
• Noncontiguous: Not sharing a common border.

Related Phrases

• Coterminous boundaries: A phrase emphasizing the shared limits, often in a geographical or political context.
  • The treaty established coterminous boundaries for the two nations.
• Coterminous periods: A phrase emphasizing identical timeframes.
  • The contracts have coterminous periods of five years.

Adjective

1. being of equal extent or scope or duration