A building whose roof and walls are made mainly of glass and that is used to grow plants that require special climatic conditions. A synonym is 'Gewächshaus' (greenhouse).
example
Im botanischen Garten gibt es ein großes Glashaus für tropische Orchideen.
In the botanical garden, there is a large glasshouse for tropical orchids.
Usage tips
Word composition
The word 'Glashaus' (glasshouse) is a simple compound of 'das Glas' (glass) and 'das Haus' (house). So it literally describes a house that is made mainly of glass.
EXAMPLE
Im Winter stellen wir die empfindlichen Pflanzen ins Glashaus.
In winter, we put the sensitive plants in the glasshouse.
Fixed expression
This meaning exists only in the idiom 'Wer im Glashaus sitzt, sollte nicht mit Steinen werfen.' (People who live in glass houses shouldn't throw stones.) It means you should not criticize others for mistakes that you make yourself. Often only the part 'im Glashaus sitzen' (to live in a glass house) is used.
EXAMPLE
Du beschwerst dich über meine Unpünktlichkeit? Du sitzt wirklich im Glashaus!
You're complaining about my being late? You really live in a glass house!
Context clue
The meaning is easy to distinguish. If it is about plants, gardens, or architecture, the building is meant. If it is about criticism, hypocrisy, or other people's faults, the idiom is meant.
EXAMPLE
Dieses moderne Bürogebäude sieht aus wie ein riesiges Glashaus.
This modern office building looks like a giant glasshouse.
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synonym · near_synonym · confusable
Glashaus vs Gewächshaus
greenhouse
'Gewächshaus' and 'Glashaus' can both mean a transparent building where plants grow. In this sense, they are very similar. However, 'Gewächshaus' is the more common and more precise word when talking about gardening, vegetables, or delicate plants. 'Glashaus' emphasizes the material glass more strongly and can also appear in the idiom 'Wer im Glashaus sitzt, sollte nicht mit Steinen werfen' (people who live in glass houses shouldn't throw stones). For that reason, 'Glashaus' can sometimes be misunderstood. For plants, 'Gewächshaus' is usually the clearest choice.
Glashaus
Hinter dem alten Bauernhof steht ein kleines Glashaus mit vielen jungen Pflanzen.
Behind the old farmhouse, there is a small glasshouse with many young plants.
Gewächshaus
Im Gewächshaus wachsen die Tomaten auch bei kühlem Wetter gut.
The tomatoes grow well in the greenhouse even in cool weather.