The phrase "defined timeframe" means a specific, clear, and set period of time in which something is expected to happen or be completed. Full definition
Once you know what you want from trading, you must systematically define a timeframe and a working plan for your trading career. (makemoneyyourway.com)
Eating during a more defined timeframe helps guarantee that you get the majority of your calories earlier in the day. (health.com)
The... technicians to ensure transactions close within defined timeframes. (ziprecruiter.com)