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REFERENCE

AAAA

aaaa
  1. 1 battery size (n.)
    B1 Intermediate

    a very small size of battery, thinner than the common AAA size.

    a standard size of dry cell battery, typically used in small electronic devices requiring a compact power source.

    Example

    This small laser pointer needs two AAAA batteries to work.

    Example

    The stylus is designed with a slim profile that necessitates the use of AAAA batteries rather than the more common AAA variety.
  2. 2 baseball player (n.)
    C1 Advanced American English Slang Sport

    a player who is too good for the minor leagues but not quite good enough for the major leagues.

    a professional baseball player who consistently excels at the Triple-A level but fails to maintain a position on a Major League roster.

    Example

    He is a classic AAAA player who hits home runs in the minors but struggles in the big leagues.

    Example

    Scouts often label him an AAAA talent, noting that while his Triple-A statistics are elite, his high strikeout rate suggests he cannot handle Major League pitching.

    Usage

    Usually used as an attributive noun before 'player' or 'talent'.

    Teacher's tip

    This is a very specific sports term; learners should use it only when discussing the professional baseball hierarchy in North America.
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  1. 3 internet record (n.)
    C2 Proficiency Technical Computing

    a type of record that connects a website name to an IPv6 address.

    a DNS resource record used to map a hostname to a 128-bit IPv6 address.

    Example

    The technician had to update the AAAA record to make the website work with the new internet protocol.

    Example

    While the A record points to an IPv4 address, the AAAA record is essential for ensuring the server is reachable over IPv6 networks.

    Usage

    Pronounced as 'quad-A' by many IT professionals.

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