English Reference
noun

speculation

n.
US /ˌspɛkjəˈɫeɪʃən/ UK /spˌɛkjʊlˈeɪʃən/ spec·u·la·tion UK spelling speculations

  1. 01 B2 Upper Intermediate

    forming an opinion or theory without having all the facts or certain proof.

    the act of theorising or conjecturing about a subject without firm evidence. Often uncountable when referring to the general activity.

    Simple

    There has been a lot of speculation about who will win the election next month.

    In context

    The media's constant speculation regarding the CEO's health caused the company's stock price to fluctuate wildly before the official statement.

  2. 02 C1 Advanced Technical Business

    buying something like land or stocks hoping the price will go up so you can sell it for a big profit.

    the practice of engaging in risky financial transactions in an attempt to profit from short-term fluctuations in market value.

    Simple

    He lost most of his savings through reckless speculation in the property market.

    In context

    The economic crisis was largely attributed to excessive speculation in subprime mortgages by major financial institutions.

    Usage

    Often takes the preposition 'in' followed by the asset type.

  3. 03 C2 Proficiency Technical Computing

    a process where a computer predicts which path a program will take and starts the work early.

    the execution of tasks by a computer system before it is certain they are actually required, in order to improve performance.

    Simple

    Modern processors use speculation to speed up how they handle complex instructions.

    In context

    Security vulnerabilities were discovered in the way the processor handled branch speculation during high-speed data processing.

    predictive execution

Speculation about the future of Vinícius Júnior, who had 12 months left on his contract, would not go away.

The Guardian· 15 Aug 2026

In the three months since, the speculation around Ocasio-Cortez’s ambitions – for herself and for America – has only grown louder.

The Guardian· 15 Aug 2026

Etymology tree Middle English speculation English speculation From Middle English speculacioun, speculation, from Old French speculation (compare French spéculation), from Late Latin speculātiō, speculātiōnem, from Latin speculor. Morphologically speculate + -ion.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Latin speculor
Level B2 · Upper Intermediate
Frequency Frequent
Updated