Definition
Latin: "by the body and by the mind." A phrase expressing the dual requirement — physical act and mental intent — for the legal acquisition or assertion of certain rights, most commonly possession. A person acquires or holds possession corpore et animo when both elements are present: the corpus (physical control or contact) and the animus (the intent to hold or claim). The phrase captures the classical Roman law position that possession is not a purely physical state but a compound of fact and will.
Common Confusion
Corpore et animo is sometimes loosely equated with the concept of actual possession, but the phrase is more precise. Actual possession often refers only to the physical element. Corpore et animo insists on both components simultaneously and is typically invoked to distinguish full, legally cognizable possession from incomplete or ambiguous physical control. A related phrase, animo solo (by intent alone), describes the possibility of retaining possession through mental intent even after losing physical contact — the conceptual counterpart to corpore et animo, not its synonym.
Core Elements
1. Corpore (by the body): The physical element. Requires some act of taking, holding, or exercising control over the subject matter. The degree of physical engagement required has been debated across legal traditions — Roman law did not demand continuous bodily contact but required an act sufficient to manifest control.
2. Animo (by the mind): The mental element. The holder must intend to possess for themselves, not merely on behalf of another, and must intend to assert possession rather than hold as a licensee or agent. This is the animus possidendi — the will to possess.
Both elements must coexist for possession to be complete in the legal sense. Losing either element has distinct consequences: loss of corpus while retaining animus may preserve possession in certain circumstances (possession animo solo); loss of animus while retaining corpus may reduce the relationship to mere detention or custody.
Why It Matters in Research
This phrase appears most often in property law research, particularly in contexts involving adverse possession, abandonment, delivery of goods, and the acquisition of possession over land or chattels. Its Roman law origin means it surfaces frequently in civil law jurisdictions and in common law treatises drawing on Romanist learning — Blackstone, Savigny, and the institutional writers all engage with this framework.
Researchers working in adverse possession will encounter the phrase when courts or treatises analyze whether the claimant's possession was legally sufficient: physical presence alone, without the requisite intent, will not suffice. Conversely, intent without physical foothold will not ripen into protected possession.
The phrase also appears in delivery and bailment contexts. A valid transfer of possession of goods — whether by sale or pledge — traditionally required both corpore (actual or constructive physical transfer) and animo (mutual intent to transfer and receive). Understanding this dual requirement helps researchers trace why certain transactions failed or succeeded in historical cases.
In the Law Mind corpus, expect corpore et animo to appear in: property treatises discussing possession theory, common law and civil law comparative materials, adverse possession cases from the 18th and 19th centuries, and delivery-of-goods disputes. It is less common in contemporary American judicial opinions, which tend to unpack the same elements in plain English rather than Latin formula — making the phrase a useful key for locating older materials on the same underlying doctrine.
Historical Dictionary Support
All three source dictionaries — Black's (1st ed.), Black's (2nd ed.), and Burrill's — give identical or near-identical definitions, each citing Digest 41.2.3 as authority. That uniformity is itself informative: this is a phrase with a stable, uncontested meaning in the common law dictionary tradition, transmitted directly from Roman jurisprudence without meaningful transformation.
The Digest passage cited (Dig. 41, 2, 3) is from Ulpian's commentary on the Edict, within the title De adquirenda vel amittenda possessione (On acquiring or losing possession). Ulpian and Paul debated extensively in that title how much physical engagement was required and how intent modified the analysis — discussions that shaped both civil law and, through reception, common law thinking on possession.
What the historical dictionaries do not address is how courts applied the phrase operationally: they give the definition but not the doctrinal friction. Researchers should not rely on dictionary entries alone for this term; the Roman source material and the treatise literature (particularly Savigny's Das Recht des Besitzes and its English translations) provide the working doctrine.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Possession (Property Law); Adverse Possession; Delivery and Transfer of Personal Property.