(noun) - a system formed by the interaction of all living things with each other and with the physical and chemical factors of the environment in which they live
(noun) - a proclamation issued by President Lincoln in September 1862, effective January 1, 1863, freeing the slaves in all territory still at war with the Union
(noun) - everything surrounding one (e.g., Earth’s environment includes everything in and on earth’s surface and its atmosphere within which organisms, communities, and objects exist)