noun (used with a singular or plural verb) .
Also, grass roots.
the common or ordinary people, especially as contrasted with the leadership
of a political party, social organization
, etc.; the rank and file.
the agricultural and rural areas of a country.
the people inhabiting these areas, especially as a political, social, or economic group.
the origin or basis of something; the basic or primary concept, rule, part, or the like.
of, pertaining to, or involving the common people, especially as contrasted with or separable from an elite: a grassroots movement for nuclear disarmament.
1910–15 Americanism for def 1