| Acronym | Definition |
|---|
| FMN | Federación Mexicana de Natación (Spanish: Mexican Simming Federation) |
| FMN | Firmes Multinationales (French: Multinational Companies) |
| FMN | Forget Me Not |
| FMN | Fire Management Notes (journal; now Fire Management Today) |
| FMN | Financial Management Network |
| FMN | Fixed Matching Network |
| FMN | Farmington, NM, USA - Four Corners Regional Airport (Airport Code) |
| FMN | Flavin Mono-Nucleotide |
| FMN | Feasible Multicast Network |
| FMN | Family Network (psychology) |
| FMN | Financial Markets and New Financial Instruments (IMF) |
| FMN | Forest Monitoring Network |
| FMN | Fédération Musicale de Namur (French: Namur Musical Federation; Namur, Belgium) |