m

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m

The letter M is written in uppercase on a lined practice sheet.

Definition

  1. Noun:

    • The 13th letter of the English alphabet: "M" is the 13th letter in the modern English alphabet, coming after L and before N.
    • A unit of information storage: In computing, "M" can represent a megabyte (MB), which is a unit of digital information equal to 1,048,576 bytes (2^20) or, in some contexts, 1,000,000 bytes (10^6).
    • The Roman numeral for one thousand: "M" is the Roman numeral representing the number 1,000.
    • A unit of concentration in chemistry: In chemistry, "M" stands for molarity, which is a measure of concentration defined as the number of moles of solute per liter of solution.
    • A unit of length: "M" is the symbol for the meter (or metre), the base unit of length in the International System of Units (SI).

  2. Adjective:

    • Denoting a quantity of one thousand: Used as an abbreviation, "M" can mean one thousand, especially in financial or numerical contexts (e.g., $5M means five thousand dollars).
Usage Examples

  • Noun:

    • The word "mother" starts with the letter M.
    • This file is 5 M in size. (Here, "M" means megabytes.)
    • In Roman numerals, M represents 1000.
    • The solution has a concentration of 0.5 M. (Here, "M" means molar.)
    • The room is 3 m wide. (Here, "m" means meters.)

  • Adjective:

    • The company earned $2M in revenue last quarter. (Here, "M" means thousand.)
Advanced Usage
  • "M" as a prefix: In the metric system, "m-" is a prefix meaning "milli-" (one-thousandth), while "M-" can mean "mega-" (one million). However, these are considered separate prefixes, not the standalone letter "M".
  • "M" in titles: Used as an abbreviation for titles like "Mister" (Mr.) or as part of academic titles (e.g., M.A. for Master of Arts). These are specific abbreviations.
Variants and Related Words
  • MB (Megabyte): A unit of digital information.
  • mm (millimeter): A unit of length equal to one-thousandth of a meter.
  • Molar (adj): Relating to the concentration unit "M".
Synonyms
  • Thousand (when "M" is used as a numeral).
  • Megabyte (in computing contexts).
  • Meter (in measurement contexts).
Related Phrases (Phrasal Verbs/Common Combinations)
  • "M&A": An abbreviation for "Mergers and Acquisitions".
  • "M.O.": An abbreviation for "Modus Operandi" (a method of operating).
Related Idioms
  • "MIA": An abbreviation for "Missing In Action".
  • "From A to Z": An idiom meaning "completely" or "thoroughly", where "M" is one of the letters in the sequence.
m

The letter M is written in uppercase on a lined practice sheet.

Noun
  1. the 13th letter of the Roman alphabet
  2. a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes
  3. a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes
  4. the cardinal number that is the product of 10 and 100
  5. concentration measured by the number of moles of solute per liter of solution
  6. the basic unit of length adopted under the Systeme International d'Unites (approximately 1.094 yards)
Adjective
  1. denoting a quantity consisting of 1,000 items or units

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