Habitats are the unique ecological areas in which particular animals, plants or other organisms live.

Source: EUROSTAT

‘habitat within a protected site’ means any habitat of species for which an area is classified as a special protection area pursuant to Article 4(1) or (2) of Directive 79/409/EEC, or any natural habitat or a habitat of species for which a site is designated as a special area of conservation pursuant to Article 4(4) of Directive 92/43/EEC;

Source: EURO-Lex

Protected species and natural habitats might also be defined by reference to species and habitats protected in pursuance of national legislation on nature conservation. Account should nevertheless be taken of specific situations where Community, or equivalent national, legislation allows for certain derogations from the level of protection afforded to the environment.

Source: EURO-Lex

(1) The place or type of site where an organism or population naturally occurs. 
(2) Terrestrial or aquatic areas distinguished by geographic, abiotic and biotic features, whether entirely natural or semi-natural.

Source: EEA Glossary

the place or type of site where an organism or population naturally occurs. The space in which an organism, population, or species lives.

Source: EEA Glossary

1) The physical location or type of environment in which an organism or biological population lives or occurs. 
2) The place occupied by an organism, population, or community. It is the physical part of the community structure in which an organism finds its home, and includes the sum total of all the environmental conditions present in the specific place occupied by an organism. Often a habitat is defined to include a whole community of organisms.

Source: EEA Glossary

1) The locality in which a plant or animal naturally grows or lives. It can be either the geographical area over which it extends, or the particular station in which a specimen is found. 
2) A physical portion of the environment that is inhabited by an organism or population of organisms. A habitat is characterized by a relative uniformity of the physical environment and fairly close interaction of all the biological species involved. In terms of region, a habitat may comprise a desert, a tropical forest, a prairie field, the Arctic Tundra or the Arctic Ocean.

Source: EEA Glossary