Horner adjective 1noun 2forms 3 adjective1 •Of, relating to, or characteristic of the Horn of Africa, its nations, or its inhabitants.Havng aerobic endurance is a Horner trait noun2 •(informal) Someone who is from the Horn of Africa.Oromos are the most populous Horners, whilst Amharas are the most populous highland Horners •The River Horner or Horner Water, a minor river in Somerset which passes through the hamlet. formsHorners · more Horner · most Horner