the basic substance used to make, develop, build, measure etc something
physical foundation
Cases of word usage
1) a way of thinking, set of ideas, characteristic of a person, group etc, especially as forming the basis of an economic or political system (ideology)
2) to claim, suggest (something) as necessary, especially as a basis for reasoning (postulate)
3) the level of sea halfway between high and low tide, used as the basis for measuring height of land and depth of sea (sea-level)
