Something that ought to be the case as opposed to already being the case.

"should" is an auxiliary verb used to indicate opinion, advice, or instruction about what is required or desirable, often issuing instructions with less force of authority than alternatives like "shall" or "must," giving advice or opinion on beneficial or desirable actions, pointing out something remarkable in a good or bad way with verbs like "see" or "hear," and asking what is correct, proper, or desirable in questions.

"should" is an auxiliary verb that expresses expectation and indicates that something is expected to have happened or be the case now, as well as indicating a degree of possibility or probability that the stated thing will happen or be true in the future.

(auxiliary, subjunctive) Used to form a variant of the present subjunctive, expressing a state or action that is hypothetical, potential, mandated, etc.

(auxiliary) simple past of shall

Used as an alternative to "would" with first person subjects, to express a conditional outcome, to impart a tentative or polite nuance, and to give suggestions or recommendations in another person's situation.

To make a statement of what ought to be true, as opposed to reality. (Can we add an example for this sense?)