(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

• trusteeship
• truster
• trust estate
• trust estates as business companies
• trust ex delicto
• trust ex maleficio
• trust for value
• trust fund
• trust fund doctrine
• trust fund immunity
• trust fund theory
• trust indenture
• Trust Indenture Act
• trust indorsement
• trust in invitum
• trust instrument
• trust inter vivos
• trustis
• trust legacy
• trust officer
• trustor
• trust power
• trust property
• trust receipt
• trust res