is supposed to

Ought to, theoretically

Is supposed to indicates expectation or obligation.

Someone who is supposed to do something has a duty or plan to do it: You're supposed to call when you arrive.

It also conveys general belief or reputation: This restaurant is supposed to be excellent.

In the negative, not supposed to means prohibited or inadvisable: You're not supposed to park here.

Related

presumption · in theory · on paper · duty · do the right thing · follow the rules · hypothetical · standard · inference · expectation · conjecture · norm · accountability · mandate · compliance · doubt · assumed · rule

Opposites
obligation/expectation

is supposed toneed not

Isn't required to

needn't

permission/prohibition

is supposed tomust not

Forbidden to do

cannot

epistemic certainty

is supposed todemonstrably

In a provable manner

certainly · in fact

Family

suppose, supposed, supposes, supposing, supposition, supposedly, pose, posed, poses

Familiarity
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Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G