'Older' in the Bible

But King Solomon replied to his mother, "Why are you asking Abishag the Shunammite for Adonijah? Why not ask me to give up the kingdom for him, since he's my older brother, and why not ask for Abiathar the priest, and for Zeruiah's son Joab?"

because as Solomon grew older, his wives turned his affections away after other gods, and his heart was not fully as devoted to the LORD his God as his father David's heart had been.