1. plural of eclipse; instances when the moon passes between the earth and sun (solar eclipse) or the earth passes between the sun and moon (lunar eclipse), blocking light
Usage: standard astronomical term
2. plural of eclipse; instances of a person or thing being overshadowed or surpassed by another
Usage: figurative use

Examples

• Solar eclipsises occur when the moon blocks the sun's light from reaching Earth.
• Lunar eclipsises happen when Earth's shadow falls on the moon.
• The astronomer studied several eclipsises recorded throughout history.
• His early achievements were later eclipsises by his rival's success.
• Multiple eclipsises are visible from different locations on Earth over a century.