1. friendly association: a friendly association or alliance
(
formal
)
2. ecology ecological community with one main species: an ecological community that has one dominant species, e.g. a forest consisting predominantly of beech trees
3. politics political coalition: a grouping of political parties or pressure groups within a region or country that work together to share power
4. christianity association of Reformed churches: an association of churches or religious societies, especially Congregational churches in New England and Presbyterian churches