The character 蒙 has three primary pronunciations and sets of meanings.
1. méng (2nd Tone)
2. mēng (1st Tone)
3. měng (3rd Tone)
The character 蒙 holds significant weight in two distinct cultural areas: education and etiquette.
Understanding which pronunciation to use is entirely context-dependent.
The most common mistake for learners is confusing the three pronunciations.