speculation

英[,spekjʊ'leɪʃn] 美[,spɛkju'leʃən]

1. a message expressing an opinion based on incomplete evidence

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. an investment that is very risky but could yield great profits;

"he knew the stock was a speculation when he bought it"

4. 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"