The first direction is moving from known concepts to an unknown conception. Constructing a definition requires a suitable relation among a wider class and its distinguishing features.
For example, a learner who does not understand “square” may benefit from the description “a right-angled plane figure with four equal sides.” Familiar concepts combine to clarify a new one.
Listing many properties does not always provide a correct definition. Logic asks whether the proposed characteristics clarify the intended concept and distinguish it appropriately.