The primary legal meaning of “issue”
“Issue” is a technical legal term used in succession and inheritance law and some discretionary trusts. “Issue” is not defined in wills and succession legislation even though it occurs in some legislative provisions. Its legal meaning has been developed under the general (common) law going back to at least 16th century English cases.
Under the general law the “issue” of a person means all of their lineal descendants by blood of every degree, including their children. That is your “issue” includes not just your children but all of your lineal descendants of all degrees – your children, grandchildren, great-children and so down the line without limit. See infographics. This is the primary legal meaning of issue.
Adopted children – while the primary meaning of issue is about blood relations, legally adopted children can be described as “issue” in certain circumstances and the operation of the respective adoption of children statutes.