1. to form a theory or theories about something; to speculate or hypothesize

Examples

• Scientists theorize that the universe is expanding at an accelerating rate.
• Historians theorize about the causes of the empire’s collapse.
• She began to theorize about why the experiment had failed.
• Researchers theorize that climate change affects migration patterns.
• The detective theorized that the crime was committed by someone familiar with the building.
• Economists theorize about market behavior during recessions.