v. spec·u·lat·ed, spec·u·lat·ing, spec·u·lates
1. To engage in a course of reasoning often based on inconclusive evidence; conjecture or theorize.
2. To engage in the buying or selling of a commodity with an element of risk on the chance of profit.
To assume to be true without conclusive evidence: speculated that high cholesterol was a contributing factor to the patient's health problems.
[Latin speculārī, speculāt-, to observe, from specula, watchtower, from specere, to look at; see spek- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.