Just

adj.thoughtful, kindformal

What it means

Guided by a consistent standard of what is morally right.

Reach for it when praising a person, decision, rule, or outcome for principled fairness

A just manager heard both accounts before deciding what to do.

everyday
fair
balanced treatment is the main point
not when Fair may mean merely acceptable; just carries a clearer moral standard.
professional
equitable
different needs must be considered to reach a fair result
not when Equitable is about allocation and treatment, not a person's whole character.
professional
principled
the person follows stated values under pressure
not when Principled can describe harmful consistency if the principles themselves are unjust.
professional
unbiased
freedom from prejudice is the claim you can support
not when Unbiased is risky when hidden assumptions have not actually been examined.
formal
impartial
the decision-maker favors no side
not when Impartiality cannot make an unjust governing rule fair.
formal
lawful
compliance with law is the precise claim
not when A lawful action is not automatically fair or morally just.
literary
righteous
moral rightness is emphatic or religious in tone
not when Righteous may sound self-congratulatory in ordinary praise.
literary
upright
a person's moral character is consistently honorable
not when Upright describes character, not whether one isolated outcome is fair.

just outcome
The mediator worked toward a just outcome for every tenant.
just cause
They accepted hardship in pursuit of a just cause.
just society
A just society protects people with little power as carefully as everyone else.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.