Definitions

1. noun

a small fish (family Mullidae) that are found in warm waters and are often used as bait, a type of ecstasy or other psychoactive substance, or a colloquial or slang term for a female friend

“The fisherman used a molly as bait to catch the large fish.”

2. noun

a type of anchor or mooring device used to secure a ship or boat to the sea bed

3. proper noun

a chemical compound, N-methyl-3-piperidyl benzilate, used as a research chemical and a potential precursor to other substances

“The chemist studied the properties of molly as a potential precursor to other compounds.”

4. verb

to damage or impair the condition of something, especially a machine or a mechanical part