The noun fundamental has 1 sense (no senses from tagged texts)
1. fundamental, fundamental frequency, first harmonic -- (the lowest tone of a harmonic series)
Overview of adj fundamental
The adj fundamental has 3 senses (first 3 from tagged texts)
1. (10) cardinal, central, fundamental, key, primal -- (serving as an essential component; "a cardinal rule"; "the central cause of the problem"; "an example that was fundamental to the argument"; "computers are fundamental to modern industrial structure")
2. (7) fundamental, rudimentary, underlying -- (being or involving basic facts or principles; "the fundamental laws of the universe"; "a fundamental incomatibility between them"; "these rudimentary truths"; "underlying principles")
3. (1) fundamental, profound -- (far-reaching and thoroughgoing in effect especially on the nature of something; "the fundamental revolution in human values that has occurred"; "the book underwent fundamental changes"; "committed the fundamental error of confusing spending with extravagance"; "profound social changes")