Definition

1. Adjective:

   • Consisting of three parts or elements; triple: Having three parts, layers, or components.
   • Three times as great or as numerous: Being three times the size, amount, or degree.

2. Adverb:

   • By three times; to three times the amount or degree: Indicating multiplication or increase by a factor of three.

Usage and Examples

• As an Adjective:

  • The agreement served a threefold purpose: to secure peace, promote trade, and ensure mutual defense.
  • They reported a threefold increase in sales after the new marketing campaign.

• As an Adverb:

  • The company's profits grew threefold over the decade.
  • Multiplying the investment threefold was his ambitious goal.

Advanced Usage

• In Formal or Literary Contexts: Often used to describe complex structures or significant multiplicative increases.
  • The problem is threefold: logistical, financial, and ethical.
  • The prophecy had a threefold meaning, understood only by the wise.

Variants and Related Words

• Threefold (adj., adv.): The standard form.
• Three-fold (adj., adv.): A less common hyphenated variant with identical meaning.
• Treble (adj., verb): Can be a synonym, especially in British English, meaning threefold or to triple.
  • They managed to treble their output.
• Triple (adj., verb): A more common synonym meaning consisting of three parts or to make three times as great.
  • She scored a triple victory.

Synonyms

• Triple
• Treble
• Three-way (for the "consisting of three parts" sense)

Notes on Meaning

• The word can function both as an adjective (describing a noun) and an adverb (modifying a verb, adjective, or another adverb).
• The adverbial use ("increased threefold") is equivalent to saying "increased by a factor of three" or "tripled."
• When used as an adjective before a noun, it often describes a purpose, increase, or structure that has three distinct aspects.

Adjective

1. having more than one decidedly dissimilar aspects or qualities; public preaching and private influence"- R.W.Emerson
   • a double (or dual) role for an actor
   • the office of a clergyman is twofold
   • every episode has its double and treble meaning-Frederick Harrison
2. three times as great or many
   • a claim for treble (or triple) damages
   • a threefold increase

Adverb

1. by a factor of three
   • our rent increased threefold in the past five years