1. not exactly known, established, or defined; uncertain
2. not leading to a definite result or conclusion
3. having no fixed or specified amount, extent, or duration

Examples

• The meeting will last for an indeterminate period of time.
• The cause of the accident remains indeterminate pending further investigation.
• She stared into the distance with an indeterminate expression.
• The test results were indeterminate and required additional analysis.
• He received an indeterminate prison sentence.
• The weather forecast shows indeterminate conditions for the weekend.
• The committee reached an indeterminate conclusion after hours of debate.