A Quick and Simple Dictionary

fret

1. (initialism) .  (physics) Förster resonance energy transfer.
2. (initialism) .  (physics) fluorescence resonance energy transfer, which is a type of the Förster phenomenon where one or both of the partners in the energy transfer are fluorescent chromophores.
3. Verb.  (transitive, obsolete/poetic) To devour, consume; eat.
4. Verb.  (transitive, and) To gnaw, consume, eat away.
5. Verb.  (transitive) To cut through with fretsaw, create fretwork.
6. Verb.  (transitive) To chafe or irritate; to worry.
7. Verb.  (intransitive) To worry or be anxious.
8. Verb.  (music) To press down the string behind a fret.
9. Noun.  (music) One of the pieces of metal/wood/plastic across the neck of a guitar or other musical instrument that marks note positions for fingering.
10. Noun.  An ornamental pattern consisting of repeated vertical and horizontal lines (often in relief).
11. Noun.  A strait; channel.
12. Noun.  (dialect, North East England) A fog or mist at sea or coming inland from the sea.