Definition 1
Green Infrastructure means trees, hedgerows, open green spaces which thread through or surround the built environment, parks, gardens designed for biodiversity, green roofs, allotments, woodlands, green corridors, rain gardens, reed beds, wetlands, water meadows and wild spaces.
Definition 2
Green Infrastructure (GI) means a strategically planned, interconnected network or spatial structure of natural and semi-natural areas [as identified on the plan at Annex xx] designed and managed to:
(a) improve environmental conditions,
(b) citizens’ health and quality of life, and
(c) to protect biodiversity,
while enhancing delivery of a wide range of ecosystem services.
Ecosystem services include water purification, air quality, space for recreation and climate mitigation and adaptation.
Drafting notes and guidance
Green infrastructure does not have a single widely recognised definition. It has been variously defined by different disciplines (primarily design, conservation and planning related).