Brown Driver Briggs

 Ephraim = "double ash-heap: I shall be doubly fruitful"
1. second son of Joseph, blessed by him and given preference over
first son, Manasseh
2. the tribe, Ephraim
3. the mountain country of Ephraim
4. sometimes used name for the northern kingdom (Hosea or Isaiah)
5. a city near Baal-hazor
6. a chief gate of Jerusalem