Not capable of being decomposed into anything more simple or ultimate by any means at present known; elementary; thus, atoms are regarded as simple bodies. Cf. Ultimate, a.
an adjective applied to numbers, information, diagrams, charts, etc. that make limited demands on the learner, for example: small whole numbers; numbers that are easier to work with, e.g. multiples of 2, 5 10, 100; uncomplicated representations of limited amounts of data, etc.