i Register
In some senses, ref is marked as informal, UK. Watch for register when choosing this word.
noun
Clipping of referee.
Abbreviation of reference.
Abbreviation of reference.
Abbreviation of refectory.
Clipping of refrigerator.
Please close the ref.
verb
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.
noun
Initialism of row echelon form.