Indeed Amber, that is one of the modern day definitions. However, look a bit closer and you'll see what Webster's lists as the likely origin.

"\God\ (g[o^]d), n. [AS. god; akin to OS. & D. god, OHG. got, G. gott, Icel. gu[eth], go[eth], Sw. & Dan. gud, Goth. gup, prob. orig. a p. p. from a root appearing in Skr. h[=u], p. p. h[=u]ta, to call upon, invoke, implore. [root]30. Cf. Goodbye, Gospel, Gossip.]"

I find that so fascinating! Here is a word that many people feel holds some magical power, as if it's the name of energy itself, when it's really just a word, that actually originated from Sanskrit, then being adopted by Indo-Germanic language, in reference to invocation! image It just goes to show how impressionable we are. There is some argument as to where the actual word, 'g-o-d', comes from originally, but for the most part experts agree.

"According to the best efforts of linguists and researchers, the root of the present word God is the Sanskrit word hu which means to call upon, invoke, implore.

Nonetheless, it is also interesting to note the similarity to the ancient Persian word for God which is Khoda."

" The ulterior etymology is disputed. Apart from the unlikely hypothesis of adoption from some foreign tongue, the OTeut. *gubom implies as its pre-Teut. type either *ghudho-m or *ghutó-m. The former does not appear to admit of explanation; but the latter would represent the neut. of the passive pple. of a root *gheu-. There are two Aryan roots of the required form (both *glheu, with palatal aspirate): one meaning 'to invoke' (Skr. hū), the other 'to pour, to offer sacrifice' (Skr. hu, Gr. χέειν, OE. yéotan YETEv.). Hence *glhutó-m has been variously interpreted as 'what is invoked' (cf. Skr. puru-hūta 'much-invoked', an epithet of Indra) and as 'what is worshipped by sacrifice' (cf. Skr. hutá, which occurs in the sense 'sacrificed to' as well as in that of 'offered in sacrifice'). Either of these conjectures is fairly plausible, as they both yield a sense practically coincident with the most obvious definition deducible from the actual use of the word, 'an object of worship'"

And in answer to your question, the word that would have been the equivalent, in Hebrew, was most likely 'El', with a plural form being 'Elohim'.