Definition

1. Noun:
   • The act of slowing down or falling behind: The process of making something happen more slowly or causing a delay in progress.
   • Lack of normal development of intellectual capacities: A condition characterized by significantly below-average intellectual functioning and deficits in adaptive behavior.
   • Any agent that retards or delays or hinders: A substance or factor that causes a process to slow down.
   • The extent to which something is delayed or held back: The degree or amount of delay.
   • A decrease in rate of change: A reduction in the speed at which something changes or progresses.

Usage Examples

• Noun:
  • The economic policy caused a significant retardation in industrial growth.
  • Early intervention is crucial for children with intellectual retardation.
  • This chemical acts as a flame retardation agent.
  • The project's retardation was due to unforeseen logistical issues.
  • Scientists observed a retardation in the reaction rate when the temperature was lowered.

Advanced Usage

• "Mental retardation": An outdated clinical term for intellectual disability. (Note: This term is now considered offensive and has been largely replaced by "intellectual disability" or "developmental disability".)
  • Historically, the term "mental retardation" was used in medical diagnoses.

Variants and Related Words

• Retard (verb): To delay or slow the progress, development, or speed of something.
  • Heavy traffic will retard our arrival.
• Retardant (noun/adjective): A substance that slows down a process, especially the spread of fire.
  • The furniture was treated with a fire retardant.
• Retarded (adjective): (Now considered offensive when referring to people) Delayed or slowed in development or progress.
  • The retarded growth of the plants was due to poor soil. (Note: When referring to intellectual development, this term is offensive and should be avoided.)

Synonyms

• Delay: A situation in which something happens later than planned or expected.
• Slowdown: A reduction in speed or activity.
• Deceleration: The act of slowing down, especially a decrease in rate of change.
• Hindrance: Something that provides resistance, delay, or obstruction to something or someone.

Antonyms

• Acceleration: The act of increasing speed or rate.
• Advancement: The process of promoting a cause or plan, or moving forward.
• Progress: Forward or onward movement toward a destination or goal.

Related Phrases

• Flame retardation: The process or act of slowing the spread of fire.
  • Flame retardation is a critical safety feature in building materials.
• Developmental retardation: Delay in reaching developmental milestones. (Note: "Developmental delay" is the preferred modern term.)
  • The child was evaluated for signs of developmental retardation.

Noun

1. the act of slowing down or falling behind
2. lack of normal development of intellectual capacities
3. any agent that retards or delays or hinders
   • flame-retardant
4. the extent to which something is delayed or held back
5. a decrease in rate of change
   • the deceleration of the arms race