speculation

noun

1. 1

   continuous and profound contemplation or musing on a subject or series of subjects of a deep or abstruse nature

   the habit of meditation is the basis for all real knowledge

2. 2

   a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence)

   speculations about the outcome of the election

   he dismissed it as mere conjecture

3. 3

   a message expressing an opinion based on incomplete evidence

4. 4

   an investment that is very risky but could yield great profits

   he knew the stock was a speculation when he bought it