(1)相互关系；共同关系；连续关系
即法律关系，指在契约当事人、遗嘱执行人与立遗嘱人、财产转让人与受让人、继承人与被继承人、主债务人与担保人等法律关系当事人之间存在的对同一财产权利的相互关系、共同关系或连续关系。

(2)私下知悉；知情；暗中参与

• conditional purpose
• conditional receipt
• conditional release
• conditional reversal
• conditional revocation
• conditional right
• conditional sale
• conditional sale contract
• Conditional Sales Act
• conditional sentence
• conditional stipulation
• conditional subscription
• conditional use
• conditional-use permit
• conditional will
• conditional zoning
• conditioned
• Conditionem testium tunc inspicere debemus cum signarent, non mortis tempore.
• Conditiones quaelibit odiosae; maxime autem contra matrimonium et commercium.
• condition implied by law
• condition implied in law
• condition in restraint of marriage
• condition meritorious
• condition of employment
• condition precedent