ef

noun1

1. •
   The name of the Latin script letter F/f.

   • I have drunk en-ee-cee-tee-ay-ar from the ef-ell-oh-doubleyou-ee-ar-ess in his gee-ay-ar-dee-ee-en many a time. — 2004

adjective1

1. •
   Initialism of extremely fine or extra fine; also XF.

noun2

1. •
   Initialism of electric field.
2. •
   Initialism of ejection fraction.