# ALFA

/ˈæɫfə/ (US) · CEFR B2 · Noun

Source: https://englishreference.com/word/alfa
Updated: 2026-05-09

## Definition

the first letter of the NATO phonetic alphabet, used to represent the letter 'A' clearly over the radio. It is also a common spelling for 'alpha', meaning the first or most important part of a group.

For teachers: the code word for the letter 'A' in the International Radiotelephony Spelling Alphabet. Often used as an alternative spelling for 'alpha' to denote the primary or dominant member of a hierarchy.

## Examples

- The pilot confirmed the coordinates starting with ALFA.
- During the radio check, the operator used ALFA to ensure there was no confusion with the letter 'E'.
- In maritime communication, the ALFA flag indicates that a vessel has a diver down and that other ships should keep well clear at slow speed.

## Usage notes

- Commonly used in aviation, military, and maritime contexts to prevent phonetic ambiguity.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.