Cases of word usage

1) (also called antenna) a part of a radio or TV system which receives or sends out signal (aerial)

2) a kind of drug used to stimulate the nervous system (amphetamine)

3) the system of weights used, before metrication, in most English-speaking countries (1 pound = 16 ounces), used for all goods except precious metals and stones, and medicines (avoirdupois)

4) the soft grey matter in the head, center of the nervous system and of thought and emotion (brain)

5) an economic and political system in which a country's trade and industry are controlled by the owners of capital (capitalism)

6) the system of ranks in society (class)

7) (a belief in) a social system in which the State owns and controls the means of wealth and production (communism)

8) (the belief in) a political and social system which maintains an established state of affairs without great or sudden change (conservatism)

9) a system (laws and principles) according to which a state is governed (constitution)

10) (a system of) religious beliefs or opinions (creed)