1. the part of the universe where life can exist, especially the region around a star where conditions allow liquid water
Usage: astronomy
2. the global ecosystem consisting of all living organisms and their physical environment on Earth
Usage: ecology

Examples

• Earth lies within the Sun’s ecosphere, making liquid water possible.
• Scientists search for planets in the ecosphere of distant stars.
• The ecosphere includes all life forms and their interactions with the environment.
• Climate change threatens the delicate balance of Earth’s ecosphere.
• Mars is outside the traditional ecosphere but may have supported life in the past.
• The ecosphere extends from deep ocean trenches to the upper atmosphere.