Illustration Pack
A collection of related illustrations sharing one style and thematic language, used consistently across a project.
In practice
An illustration pack is a set of drawings made in one consistent style, with shared line weight, color palette, proportions and themes, so they can be used across a whole project. An app might use one pack for its onboarding screens, empty states and error messages, making each feel part of the same family. Packs are often licensed from others, so check what use is permitted.
Often confused with Asset Library
An asset library stores many kinds of resources; an illustration pack is one stylistically consistent set of illustrations, which might be kept in such a library.
Try this
Draw three simple illustrations, a cup, a key and a cloud, using the same line weight and only two colors.