Hold"back` (?), n.
1.
Check; hindrance; restraint; obstacle.
The only holdback is the affection . . . that we bear to our wealth.
Hammond.
2.
The projection or loop on the thill of a vehicle. to which a strap of the harness is attached, to hold back a carriage when going down hill, or in backing; also, the strap or part of the harness so used.
© Webster 1913.