Definition of soldier for Students. : a person in military service and especially an enlisted person who is in the army.
Zeitgeist is defined as the spirit of a generation or a period of time. An example of zeitgeist is the free love and progressive thinking of the 1960s. the spirit of the age; trend of thought and feeling in a period. Origin of zeitgeist.
1 Not to be confused with psychological theories and research of Alexei Leontâev (1903â1979) and Sergei Rubinstein (1989â1960) 2  Activity theory is compared and contrasted to disengagement theory and continuity theory as a functionalist theory of social gerontology.  Also termed: