Definition of "morphosyntactic"

It is, of course, important to draw a fundamental distinction here between Tense (a morphosyntactic property) and Time Reference (a semantic property). So, for example, in (60) below: (60) If I went there tomorrow, would you come with me? went is morphologically a past-tense form, and yet is used in a future timeframe.

1988, Andrew Radford, chapter 6, in Transformational grammar: a first course, Cambridge, UK: Cambridge University Press, page 305