The traditional time, in the late afternoon, for serving tea (the meal).
From tea + time. Compare Saterland Frisian Teetied (“teatime”), West Frisian teetiid (“teatime”), Dutch theetijd (“teatime”), German Teezeit (“teatime”), Danish tetid (“teatime”), Swedish tetid (“teatime”), Icelandic tetími (“teatime”).
Practice speaking and memorizing "teatime" and many other words and sentences in English.