Groan | Mean of groan in English Dictionary

/ˈgroʊn/

• Verb
• to make a deep sound because of pain or some strong emotion (such as grief or disappointment)
1. The wounded man groaned in/with pain.
2. She groaned when she saw the bill.
3. She groaned silently/inwardly when she saw the bill. [=she was upset when she saw the bill but she did not actually groan]
• to say (something that expresses annoyance or unhappiness)
1. “Oh, no,” she groaned, “I'm going to have to start all over.”
2. She groaned that she would have to start all over.
• to complain about something
1. Merchants are groaning over slow holiday sales.
2. He's always moaning and groaning about his salary.

• to make a deep sound caused especially by weight or pressure
1. The chair groaned under his weight.
2. groaning bookshelves = bookshelves groaning with (the weight of their) books [=bookshelves filled with books]