1the wood from a conifer (such as pine, fir, or spruce) as distinguished from that of broadleaved trees.
[count noun] a tree producing softwood.
2(in gardening) young pliable growth on shrubs and other plants from which cuttings can be taken: [as modifier]:keep softwood cuttings covered until well rooted
softwood in other Oxford dictionaries
Definition of softwood in the US English dictionary