Fair

adj.thoughtful, kindeveryday

Meaning 1

Guided by consistent principles that give each person a reasonable chance.

Reach for it when describing a decision, rule, or person that avoids favoritism

The fair chairperson heard both proposals before opening the vote.

everyday
even-handed
someone treats competing sides with the same care
not when This does not fit a price or amount that is merely reasonable.
professional
impartial
the decision-maker has no favored side
not when A neutral decision-maker can still apply a rule that produces an unjust result.
formal
equitable
resources or outcomes should account for different needs
not when It is not the clearest choice for praising an ordinary person's even-handed behavior.
formal
just
moral rightness is the central claim
not when It may sound weightier than needed for dividing chores.

Acceptable in amount or quality without being exceptional.

Reach for it when giving modest approval when something meets a reasonable standard

The repair was a fair solution for the limited budget.

everyday
decent
informal, moderate approval is enough
not when Decent is vague and can undersell a genuinely strong result.
everyday
reasonable
a request, price, or compromise is sensible
not when Reasonable tolerates imperfection and does not express strict impartiality.
professional
adequate
the result meets a minimum requirement
not when It sounds faintly positive if you intend warm or enthusiastic praise.
formal
respectable
performance is solid enough to merit regard
not when Avoid it where fairness between people, not quality, is at issue.

fair decision
A fair decision explains how the same rule was applied to everyone.
fair chance
Each applicant received a fair chance to demonstrate the skill.
fair price
The cooperative pays growers a fair price for every basket.

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