1. Come up with (an idea, plan, explanation, theory, or principle) after a mental effort
   "excogitate a way to measure the speed of light"
   - invent, contrive, devise, formulate, forge 
2. Reflect deeply on a subject
   "The scientist must stop to observe and start to excogitate"
   - chew over, think over, meditate, ponder, contemplate, muse, reflect, mull, mull over, ruminate, speculate

Derived forms: excogitated, excogitates, excogitating

See also: excogitation, excogitative, excogitator

Type of: cerebrate, cogitate, create by mental act, create mentally, think

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