1 going up, increasing, or sloping upward: the rising temperature | rising ground.
• advancing to maturity or high standing: the rising generation of American writers.
• approaching (a higher level, grade, age, etc.): a rising senior at North Carolina State.
• Astrology (of a sign) ascendant.
2 [ postpositive ] Heraldry (of a bird) depicted with the wings open but not fully displayed, as if preparing for flight.