The Collaborative International Dictionary of English v.0.48:

handoff \handoff\ n. (Football)
   A football play in which one player hands the ball to a
   teammate.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

handoff
    n 1: (American football) a play in which one player hands the
         ball to a teammate

The Free On-line Dictionary of Computing (30 December 2018):

handover
handoff
HO

    (HO, or "handoff") the mechanism by which an
   on-going cellular connection between a mobile terminal (MT,
   typically a mobile phone) or mobile host (MH) and a
   corresponding terminal or host is transferred from one point
   of access of the fixed network to another.

   Handover may occur because the phone is leaving its current
   cell, to balance demand between cells, to reduce interference
   or to transfer a user who has stopped moving to a nearby cell
   with shorter range.

   (2010-05-07)