Neural network where information is fed from the input layer to the output layer in one direction only.

ETSI GR ENI 004 ANN whose inter-nodal connections do not form a cycle

NOTE: Put another way, information always moves forward and never backwards. In general, any directed acyclic graph is a type of feedforward neural network.

ISO/IEC DIS 22989 neural network (3.3.7) where information is fed from the input layer to the output layer in one direction only