अच्छाई मतलब [सं-स्त्री.] - 1. अच्छा होने का भाव या गुण 2. विशेषता; ख़ूबी 3. सुंदरता 4. लाभ या फ़ायदा। Also see Achchhai in English.
Here is meaning of Achchhai in hindi. Get definition and hindi meaning of Achchhai. What is Hindi definition and meaning of Achchhai ? (hindi matlab - arth kya hai?).