An example of speculate is to buy land way out in the country to build housing because you hear that a new manufacturing plant might be built close buy.
An example of speculate is when you brainstorm reasons why something happens but don't actually do anything to find out.
Speculated that high cholesterol was a contributing factor to the patient's health problems.
Origin of speculate
- Latin speculārī speculāt- to observe from specula watchtower from specere to look at spek- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition