noun /ˈel.ɪ.mənt/
a) One of the simplest or essential parts or principles of which anything consists, or upon which the constitution or fundamental powers of anything are based.
an element of doubt
b) Any one of the simplest chemical substances that cannot be decomposed in a chemical reaction or by any chemical means and made up of atoms all having the same number of protons.
be in ones own element
See Also: elemental, elementary
Wikipedia foundation.