Something that is required as necessary or indispensable, or as a prior condition of something else.
In education, a course or topic that must be completed before another course or topic can be started. May be colloquially referred to as a prereq.
Required as a prior condition of something else; necessary or indispensable.
Anything having substance; an essential part.
Most important; essential.
Not imaginary; real; actual; true; veritable.
Having a substance; actually existing.
Corporeal; material; firm.
Possessed of goods or an estate; moderately wealthy.
Satisfying; having sufficient substance to be nourishing or filling.
Large in size, quantity, or value; ample; significant.
Having good substance; strong; stout; solid; firm.