1. 庞大;巨大
If you refer to the enormity of something that you consider to be a problem or difficulty, you are referring to its very great size, extent, or seriousness.

2. 严重性
If you refer to the enormity of an event, you are emphasizing that it is terrible and frightening.

3. 罪恶;滔天大罪
An enormity is an action that is considered totally unacceptable.

1. an act of extreme wickedness

2. the quality of extreme wickedness

3. the quality of being outrageous

Synonym: outrageousness

4. vastness of size or extent

e.g. in careful usage the noun enormity is not used to express the idea of great size
universities recognized the enormity of their task