spec·u·la·tion 
(spĕk′yə-lāshən)
(spĕk′yə-lāshən)n.
1.
a. Reasoning based on inconclusive evidence; conjecture or supposition.
b. A conclusion, opinion, or theory reached by conjecture.
c. Archaic Contemplation or consideration of a subject; meditation.
2.
a. Engagement in risky business transactions on the chance of quick or considerable profit.
b. A commercial or financial transaction involving speculation.