F.o.

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Alternative form of FO. alt-of, alternative
  2. 2
    Alternative form of F/O. alt-of, alternative

Synonyms

All synonyms
fffield grade officerfield officerfield-grade officerfolio

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.