[in.ter.fere] vi -fered ; -fer.ing [ME enterferen, fr. MF (s')entreferir to strike one another, fr. OF, fr. entre- inter- + ferir to strike, fr. L ferire--more at bore] (15c) 1: to interpose in a way that hinders or impedes: come into collision or be in opposition
2: to strike one foot against the opposite foot or ankle in walking or running--used esp. of horses
3: to enter into or take a part in the concerns of others
4: to act reciprocally so as to augment, diminish, or otherwise affect one another--used of waves syn see interpose -- in.ter.fer.er n