(usually in the plural) A leading or primary principle, rule, law, or article, which serves as the groundwork of a system; an essential part / (physics) The lowest frequency of a periodic waveform.

Pertaining to the foundation or basis; serving for the foundation. / Essential, as an element, principle, or law; important; original; elementary.

(religion) The tendency to reduce a religion to its most fundamental tenets, based on strict interpretation of core texts. / (by extension) A rigid conformity to any set of basic tenets.

In a fundamental or basic sense; reaching the very core of the matter.

plural of fundament

Foundation. / The bottom; the buttocks or anus. / The underlying basis or principle for a theoretical or mathematical system.

plural of fundamental

(finance) The fundamental analysis data.

The state or quality of being fundamental.

The state or condition of being fundamental; essential importance.