1. forming theories or speculating about something
Usage: British spelling; American spelling is ‘theorizing’; present participle of ‘theorise’

Examples

• The scientists spent hours theorising about the cause of the unusual phenomenon.
• She was theorising that the ancient civilization had advanced knowledge of astronomy.
• Instead of theorising, we need to gather more concrete evidence.
• The professor enjoyed theorising about possible solutions to the mathematical problem.
• They were theorising about what might have happened to the missing artifacts.
• The detective was theorising about the suspect’s motives.