| DIF | • dif n. Difference. • DIF prop.n. (Computing) Initialism of Data Interchange Format. • DIF prop.n. Abbreviation of Distrito Federal, a federal district of Mexico. |
| FIB | • fib n. (Informal) A lie, especially one that is more or less inconsequential. • fib n. (Informal, rare) A liar. • fib v. (Informal, intransitive) To lie, especially more or less inconsequentially. |
| FID | • fid n. (Nautical) A pointed tool without any sharp edges, used in weaving or knotwork to tighten and form up… • fid n. (Nautical) A square bar of wood or iron, with a shoulder at one end, to support the weight of the topmast (on a ship). • fid n. A plug of oakum for the vent of a gun. |
| FIE | • fie interj. (Archaic) Often followed by on or upon: used to express distaste, disgust, or outrage. • FIE adj. whimsical, fey. |
| FIG | • fig n. A fruit-bearing tree or shrub of the genus Ficus that is native mainly to the tropics. • fig n. The fruit of the fig tree, pear-shaped and containing many small seeds. • fig n. A small piece of tobacco. |
| FIL | • fil n. A Nordic dairy product, similar to yogurt, but using different bacteria which give a different taste and texture. • fil n. (Chess) Alternative form of alfil. • fil sym. (International standards) ISO 639-2 & ISO 639-3 language code for Filipino. |
| FIN | • fin n. (Ichthyology) One of the appendages of a fish, used to propel itself and to manoeuvre/maneuver. • fin n. A similar appendage of a cetacean or other marine animal. • fin n. A thin, rigid component of an aircraft, extending from the fuselage and used to stabilise and steer the aircraft. |
| FIR | • fir n. (Chiefly countable) A conifer of the genus Abies. • fir n. (Chiefly countable) Any pinaceous conifer of related genera, especially a Douglas fir (Pseudotsuga)… • fir n. (Uncountable) Wood of such trees. |
| FIT | • fit adj. Suitable, proper. • fit adj. Adapted to a purpose or environment. • fit adj. In good shape; physically well. |
| FIX | • fix v. (Transitive, obsolete) To pierce; now generally replaced by transfix. • fix v. (Transitive) To attach; to affix; to hold in place or at a particular time. • fix v. (Transitive) To mend, to repair. |
| FIZ | • fiz v. Archaic form of fizz. • fiz n. Archaic form of fizz. • FIZ n. (Malaysia, economics, geography) Abbreviation of free industrial zone. |
| GIF | • gif n. Alternative letter-case form of GIF. • gif v. Alternative letter-case form of GIF. • Gif n. Alternative form of GIF. |
| IFF | • iff conj. (Mathematics, logic) Short for if and only if. • iff conj. Obsolete spelling of if. • IFF prop.n. Initialism of Interchange File Format, a file format standard developed for Amiga computers. |
| IFS | • ifs n. Plural of if. • IFs n. Plural of IF. • IFS n. Initialism of iterated function system. |
| KIF | • kif n. A kind of cannabis smoked in Morocco and Algeria, for narcotic or intoxicating effect. • kif n. The state of relaxed stupor induced by cannabis. • kif n. The trichome of marijuana, a green powdery substance that falls from dry marijuana high in THC and other… |
| RIF | • rif v. Alternative letter-case form of RIF. • Rif prop.n. A mountainous region in northern Morocco. • Rif prop.n. A former country in North Africa, a republic which existed briefly during the 1920s in what is now northern Morocco. |
| SIF | • Sif prop.n. (Norse mythology) A golden-haired goddess associated with earth, mother of Ullr and wife of Thor. • SIF adj. (South African) disgusting (syphilitic). |