M (EN)

letter, noun, adjective, numeral, symbol

letter “M”

1. the uppercase form of the letter "m"
   Sign up to see the translation of definitions and examples into any language.

   Mary marked the map with a big "M" to show where the mountain was located.

noun “M”

1. abbreviation of Monday
   We have a team meeting scheduled for 9 AM on M, T, W, but the rest of the week is free.
2. in the US, a content rating of 15+ years for films
   The movie we wanted to see was rated M, so we had to make sure everyone in our group was old enough to watch it.
3. slang for morphine
   After the surgery, he asked the nurse if it was time for his M to help with the pain.

adjective “M”

1. initialism for "male" (gender option provided on forms)
   On the registration form, please select M or F.

numeral “M”

1. the number thousand in Roman numerals
   In the year MCMXCIX (1999), many feared the approaching new millennium.

symbol “M”

1. mega- (a factor of one million)
   Hydrogen bombs with more than 50 Mt of force have been tested before.
2. medium (size of clothing)
   I realized the shirt was too tight, so I exchanged it for an M.
3. used to indicate "male", sometimes appended to age
   He's 30M and looking for a hiking buddy.
4. a symbol for methionine in biochemistry
   In the protein sequence, "M" stands for methionine at the start of the chain.
5. molar (one mole of substance per litre of solvent in chemistry)
   To prepare the solution, we need to dissolve the salt in water until we reach a concentration of 0.5M.
6. symbol for "major" in music
   She played a beautiful song with the CM7 chord.