ref

verb1

1. •
   (informal) To referee; to act as a referee in a sport or game.

   • On the block when we were growing up we called him Ronnie the Enforcer because he umped all the stickball games and reffed the hockey. — 1982

noun5

1. •
   (informal) Clipping of referee.
2. •
   Abbreviation of reference.
3. •
   Clipping of refsheet.
4. •
   (Philippines, informal) Clipping of refrigerator.

   • Please close the ref.
5. •
   Abbreviation of refectory.

noun1

1. •
   Abbreviation of reference.

adjective1

1. •
   Abbreviation of Reformed.

noun2

1. •
   Abbreviation of referee (title).
2. •
   Abbreviation of refining.

noun1

1. •
   Initialism of row echelon form.