Java: define terms initialization, declaration and assignment

Question

I find the defs circular, the subjects are defined by their verbs but the verbs are undefined! So how do you define them?

The Circular Definitions

initialization: to initialize a variable. It can be done at the time of declaration.

assignment: to assign value to a variable. It can be done anywhere, only once with the final-identifier.

declaration: to declare value to a variable.

[update, trying to understand the topic with lambda calc]

D(x type) = (λx.x is declared with type) 
A(y D(x type)) = (λy.y is assigned to D(x type))

%Then after some beta reductions we get initialization.
D(x type) me human                  // "me" declared with type "human"
A(y (D(x type) me human)) asking    // "asking" assigned to the last declaration

%if the last two statemets are valid, an initialization exists. Right?

question from:https://stackoverflow.com/questions/2614072/java-define-terms-initialization-declaration-and-assignment