What is the meaning of the word "question"?

Definitions:

a formal proposal for action made to a deliberative assembly for discussion and vote noun
- I posed the question of whether we should fund the neighbouring park.
a reference to a marriage proposal noun
- Where were you when your spouse popped the question?
a sentence of inquiry that asks for a reply noun
- The officer asked a direct question.
an instance of questioning noun
- There was a question about my training.
the subject matter at issue noun
- The question of disease merits serious discussion.
to challenge the accuracy, probity, or propriety of verb
- We must question your judgment in this matter.
to conduct an interview in television, newspaper, and radio reporting verb
- The reporter questioned the celebrity live.
to place in doubt or express doubtful speculation verb
- I questioned the origin of the food.
to pose a question verb
- I questioned: what makes the sky so blue?
to pose a series of questions to verb
- The police questioned the subject.
uncertainty about the truth, factuality, or existence of something noun
- There is a big question over where I'll be in five years.