What does eco mean?
Eco is an informal short form of 'ecology' or 'ecological', used to describe anything connected with protecting the natural environment. It appears most often as a combining form in everyday compounds — eco-friendly, eco-conscious, eco-tourism, eco-warrior — signalling that something is designed or practised with minimal harm to the planet. Standing alone, as in 'the brand has gone eco', it carries a casual, contemporary tone typical of advertising, journalism and everyday conversation. The word derives ultimately from the Greek 'oikos', meaning house or household, the same root that gives us economy and ecology; this origin is a useful reminder that environmental care is, at heart, about stewardship of our shared home. Because of its strong association with green marketing, eco can occasionally carry a slightly promotional or even sceptical connotation, as in accusations of 'eco-washing'. It remains one of the most productive and recognisable environmental terms in modern English.
nounAn informal shortening of 'ecology' or 'ecological', used as a noun to refer to environmental matters and as a combining form in words relating to the environment.
- As an informal noun: environmental concerns or ecological practice (often attributively).
- As a combining form: relating to ecology or the environment, as in eco-friendly, eco-tourism.
"The company's new packaging is fully eco, using recycled materials throughout."
"She has gone completely eco since moving to the countryside, growing her own vegetables and composting everything."
"The hotel markets itself as eco, with solar panels and a strict recycling policy."
Rarely pluralised; the word almost always appears in singular or attributive use.
"Different ecos call for different conservation strategies, from wetlands to woodland."
Eco comes from the Greek 'oikos', meaning house — so every 'eco' word is really about looking after our one shared home.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of eco
Eco comes ultimately from the ancient Greek 'oikos', meaning house, household or habitat. This root gave rise to 'oikologia' (the study of the home), coined in the nineteenth century as 'ecology', and also underlies 'economy' (originally household management) and 'ecumenical'. In modern English, eco was extracted as a short, productive combining form from 'ecology' and now attaches freely to other words to signal environmental relevance.
Related word forms
How eco is actually used
Informal register. Most commonly found as a combining form in compounds such as 'eco-friendly' or 'eco-conscious'; standing alone it is casual and often adjectival in feel even when classed as a noun.
Easily confused with eco
An echo is a repeated sound caused by reflection off a surface, whereas eco relates to ecology and the environment.