The evolution of sexual reproduction is a major puzzle because asexual reproduction should be able to outcompete it as every young organism created can bear its own young. This implies that an asexual population has an intrinsic capacity to grow more rapidly with each generation.
Definition of cutting. 1  1 : given to or designed for cutting; especially : sharp, edged. 2  2 : marked by sharp piercing cold cutting winds. 3  3 : inclined or likely to wound the feelings of others especially because of a ruthless incisiveness a cutting remark.  4 : intense, piercing a cutting pain.
cutting edge. Fig. the most forward part of a trend; the leading part of a trend. (Alludes to the edge of a sword. See also on the cutting edge. See also on the bleeding edge.) Fred's invention put him on the cutting edge of the computer chip business. See also: cutting, edge.