A cannabis extract is a specific type of cannabis concentrate. While concentrates can be made through both various mechanical processes and the use of a solvent, extracts are unique because they are made exclusively through the use of a solvent.
Details of the extraction process differ slightly based on the specific solvent being used. In general, the process involves combining cannabis plant materials with another chemical or substance in such a way that all the cannabinoids are stripped away from the plant matter. The plant matter is then separated from the cannabinoid-infused solvent, and the solvent is evaporated away or removed through some other mechanism What’s left behind is a mass of highly-concentrated cannabinoids.