(astronomy) The surface (plane) that contains the orbit of a planet in a solar system.

(astronomy) A phenomenon caused by light reflected off surfaces distant from the source, and arriving at the observer with a delay relative to this distance, analogous to an echo of sound.

The belief that there should be better understanding and closer co-operation between different denominations in the Christian Church.

The technique of using reflected pulses of sound to determine depth or the location of objects (or fish) under water. / A particular measurement made using this technique.

The freedom to produce, trade and consume any goods and services acquired without the use of force, fraud or theft.

(sociology) The ability of an individual or family to improve their income, and social status, in an individual lifetime or between generations.

(economics, politics) Interdisciplinary studies drawing upon economics, law, and political science in explaining how political institutions, the political environment, and the economic system — capitalist, socialist, mixed, and so on — influence each other.

Alternative spelling of macroeconomic.

Of or pertaining to a combination of social and economic factors.

(military) That part of an army that is not needed to directly combat the enemy. / (military, by extension) The administrative and supply departments of an army.