Prolog programs describe relations, defined by means of clauses.

In an explicit function definition, the result is defined by means of an expression over the inputs.

The direct limit can be defined in an arbitrary category by means of a universal property.

Molecular communication is defined as the transmission and reception of information by means of molecules.

Inekaren has defined its political program by means of the following points:

Usually it is defined by means of Period, Territory and Style.

It actually suggests that induced representation can in this case be defined by means of the adjunction.

The characters of each book must be defined by means of tempo, pace, pitch and accents, using only the reader's voice.

Addition and multiplication are recursively defined by means of successor.

What I should like to see being avoided in future might best be defined by means of an example.