conditionconditionconditionsconditionedconditioningnoun1(no plural) the state that somebody or something is in: The car was cheap and in good condition, so I bought it.2conditions (plural) the situation in which people live, work or do things: The prisoners lived in terrible conditions.3(pluralconditions) something that must happen before another thing can happen: One of the conditions of the job is that you agree to work on Saturdays.on condition that…only if: You can go to the party on condition that you come home before midnight.