The lowest or supporting part or structure:
base1, basis, bed, bottom, foot, footing, foundation, ground, groundwork, seat, substratum, underpinning (often used in plural). See overThat on which something immaterial, such as an argument or a charge, rests:
base1, basis, footing, foundation, ground (often used in plural), groundwork, underpinning (often used in plural). See overA fundamental principle or underlying concept:
base1, basis, cornerstone, foundation, fundamental, root1, rudiment (often used in plural). See over
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