1. [ verb ] to believe especially on uncertain or tentative grounds
Synonyms: suppose hypothesize theorize conjecture hypothecate hypothesise theorise

: "Scientists supposed that large dinosaurs lived in swamps."

Related terms: expect explicate reconstruct hypothesis theory hypothesis speculation guess theorist conjecture theorization supposition speculator
2. [ verb ] talk over conjecturally, or review in an idle or casual way and with an element of doubt or without sufficient reason to reach a conclusion

"We were speculating whether the President had to resign after the scandal"

Related terms: reason suppose guess guess
3. [ verb ] reflect deeply on a subject
Synonyms: reflect muse ponder meditate think_over contemplate chew_over mull excogitate ruminate mull_over

"I mulled over the events of the afternoon" "philosophers have speculated on the question of God for thousands of years" "The scientist must stop to observe and start to excogitate"

Related terms: think study wonder brood bethink puzzle theologise introspect premeditate deliberate contemplation meditation muller muse
4. [ verb ] (stock exchange) invest at a risk
Synonyms: job

"I bought this house not because I want to live in it but to sell it later at a good price, so I am speculating"

Related terms: invest bull speculation
Similar spelling:   speculative