noun

• (soccer, US) Initialism of Major League Soccer, the top league of men's soccer in the US.
• (US, real estate) Initialism of multiple listing service.
• (aviation) Initialism of microwave landing system.
• Initialism of Master of Legal Studies, a master's degree offered by some law schools to students who wish to study the law but do not want to become attorneys.
• (pharmacology) Initialism of macrolide, lincosamide, and streptogramin. [(organic chemistry) a macrocyclic lactone with a ring of at least ten atoms]