ADJ. pure Whether the business will survive another ten years is pure conjecture.
PREP. ~ about/as to There was a lot of conjecture as to the extent of her wealth.
PHRASES a matter for conjecture, open to conjecture Whether she will run for a second term in office is open to conjecture.
You can also check other dicts: conjecture (English, 中文解释 ), wordnet sense, Collins Definition
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