In samskrtam, the same word means differently based on the context. This is the beauty of the divine language
As far as the meaning of Deva is concerned, the term " Deva" refers to Vishnu as well as Idol as stated by Monier.
Deva for VishNu
Udbhavah kshobhaNO devah SrIgarbhah parameSvarah !
--- MahAbharata 12-135- 54
Deva for Idol
KItopi sumanasangAdArohati satAm Sirah !
ASmApi yAti devatvam mahadbhih supratishthitah !
In my humble view if Apte is VAmana, Monier is Trivikrama.