GRAIN (initially the International Coalition for Development Action or ICDA) is a small international non-profit organisation that works to support small farmers and social movements in their struggles for community-controlled and biodiversity-based food systems.

Grains are small, hard, dry seeds, with or without attached hulls or fruit layers, harvested for human or animal consumption. Agronomists also call the plants producing such seeds "grain crops". The two main types of commercial grain crops are cereals such as wheat and rye, and legumes such as beans and soybeans. Ubiquity of grain as a food source encouraged use of the term to describe other particles with volume or mass similar to an individual seed.