Definition of “speculation” - English Dictionary

“speculation” in British English

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speculationnoun [ C or U ]

uk /ˌspek.jəˈleɪ.ʃən/ us /ˌspek.jəˈleɪ.ʃən/

speculation noun [ C or U ] (GUESS)

C1 the activity of guessing possible answers to a question without having enough information to be certain:

Rumours that they are about to marry have been dismissed as pure speculation.
Speculation about his future plans is rife.
[ + that ] News of the president's illness fuelled/prompted speculation that an election will be held later in the year.

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(Definition of “speculation” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“speculation” in Business English

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speculationnoun [ C or U ]

uk /ˌspekjəˈleɪʃən/ us

the act of guessing possible answers to a question without having enough information to be certain:

Rumours that the CEO is retiring have been dismissed as pure speculation.
speculation about sth The news led to speculation about possible further departures among the senior executive team.
speculation (that) There is speculation that fourth quarter GDP growth could be revised downwards.
The dollar rose amid speculation that central banks could buy the currency in collaboration.
fuel/prompt speculation The chairman's speech fuelled speculation that a merger will happen later in the year.
on speculation The stock shot up recently on speculation that a financing package was imminent.

FINANCE the act of buying something hoping that its value will increase and then selling at this higher price in order to make a profit:

speculation on/in sth Evidence that the economy is accelerating could fuel further speculation in commodity markets.
The share issue coincided with a huge rise in amateur stock market speculation.

(Definition of “speculation” from the Cambridge Business English Dictionary © Cambridge University Press)