1. That which comprises or concentrates in itself the essential qualities of a larger thing or of several things; specifically: a summary or an epitome, as of a treatise or book, or of a statement; a brief.
2. A state of separation from other things
3. An abstract term.
4. A powdered solid extract of a vegetable substance mixed with sugar and milk in such proportion that one part of the abstract represents two parts of the original substance.