WordWeb Online

1. Not composed of measured syllables; not metrical
   "unmeasured prose"
    
2. Without limits in extent, size or quantity
   "The long unmeasured pulse of time moves everything. There is nothing hidden that it cannot bring to light, nothing once known that may not become unknown.";
   - illimitable, limitless, measureless

See also: immeasurable, immensurable, immensurate, unmeasurable, unrhythmic, unrhythmical