Epistemic modality ("He will be in London now") and futurity ("He will see her tomorrow") are generally associated with each other. This seems to be fairly common cross-linguistically, but there are enough subtle differences between them to make it quite individual to the speech variety in question.
In Old English, no synthetic ...
A specific term is unknown to me, but the task of disentangling the meanings of a word is named word sense disambiguation in computational linguistics. So I think word sense is usable for the pair (word, meaning) even without being a formal term.
1- particular grammar of a particular language which, in a purely mechanical way is capable of enumerating all and anly the grammatical sentences of that language. Generative grammar in this sense was introduced by Noam Chomsky in the 1950s
2- Any theory of grammar which has as its goal the construction of such grammar
Generative grammar has its roots firmly ...