re‧a‧li‧za‧tion (also realisation British English) /ˌrɪəlaɪˈzeɪʃən $ -lə-/ noun [singular, uncountable]
[Word Family: noun: realism, realist, reality, unreality, realization; adverb: real, really, realistically ≠ unrealistically; adjective: real, unreal, realistic ≠ unrealistic; verb: realize]

1. when you understand something that you had not understood before
realization of
I was shocked by the realization of what I had done.
realization that
the realization that she might never recover from her illness
There is a growing realization that we must manage the earth’s resources more carefully.

2. formal when you achieve something that you had planned or hoped for Synonym : achievement
realization of
the realization of his dreams

3. technical when you change something into money by selling it:
the realization of assets

[TahlilGaran] Dictionary of Contemporary English ▲