1.  ownership(n = noun.possession) - the relation of an owner to the thing possessed; possession with the right to transfer possession to others;
is a kind of relation
has particulars: community, severalty, property right, proprietary, proprietorship, employee ownership, landholding, stockholding
Derived forms noun owner₁, noun owner₂

2.  ownership(n = noun.act) possession - the act of having and controlling property;
is a kind of control
has particulars: actual possession, constructive possession, criminal possession, holding, keeping, retention
Derived forms noun owner₁, noun owner₂

3.  ownership(n = noun.state) - the state or fact of being an owner;
is a kind of state
Derived forms noun owner₁, noun owner₂

   The state of being an owner; the right to own; exclusive right of possession; legal or just claim or title; proprietorship. [1913 Webster]

N  possession, seizin, seisin, ownership, occupancy, hold, holding, tenure, tenancy, feodality, dependency, villenage, villeinage, socage, chivalry, knight service, exclusive possession, impropriation, monopoly, retention, prepossession, preoccupancy, nine points of the law, corner, usucaption, future possession, heritage, inheritance, heirship, reversion, fee, seigniority, primogeniture, ultimogeniture, futures contract, warrant, put, call, option, right of first refusal, bird in hand, uti possidetis, chose in possession, possessing, worth, possessed of, seized of, master of, in possession of, usucapient, endowed with, blest with, instinct with, fraught with, laden with, charged with, possessed, on hand, by one, in hand, in store, in stock, in one's hands, in one's grasp, in one's possession, at one's command, at one's disposal, one's own, unsold, unshared, entbehre gern was du nicht hast, meum et tuum, tuum est.

N  property, possession, suum cuique, meum et tuum, ownership, proprietorship, lordship, seignority, empire, interest, stake, estate, right, title, claim, demand, holding, tenure, vested interest, contingent interest, beneficial interest, equitable interest, use, trust, benefit, legal estate, equitable estate, seizin, seisin, absolute interest, paramount estate, freehold, fee tail, fee simple, estate in fee, estate in tail, estate tail, estate in tail male, estate in tail female, estate in tail general, limitation, term, lease, settlement, strict settlement, particular estate, estate for life, estate for years, estate pur autre vie, remainder, reversion, expectancy, possibility, dower, dowry, jointure, appanage, inheritance, heritage, patrimony, alimony, legacy, Falcidian law, paternal estate, thirds, assets, belongings, means, resources, circumstances, wealth, money, what one is worth, what one will cut up for, estate and effects, landed property, landed real estate property, realty, land, lands, tenements, hereditaments, corporeal hereditaments, incorporeal hereditaments, acres, ground, acquest, messuage, toft, territory, state, kingdom, principality, realm, empire, protectorate, sphere of influence, manor, honor, domain, demesne, farm, plantation, hacienda, allodium, fief, fieff, feoff, feud, zemindary, dependency, arado, merestead, ranch, free lease-holds, copy lease-holds, folkland, chattels real, fixtures, plant, heirloom, easement, right of common, right of user, personal property, personal estate, personal effects, personalty, chattels, goods, effects, movables, stock, stock in trade, things, traps, rattletraps, paraphernalia, equipage, parcels, appurtenances, impedimenta, luggage, baggage, bag and baggage, pelf, cargo, lading, rent roll, income, maul and wedges, patent, copyright, chose in action, credit, debt, one's own, landed, predial, manorial, allodial, free lease-hold, copy lease-hold, feudal, feodal, to one's credit, to one's account, to the good, to one and his heirs for ever, to one and the heirs of his body, to one and his heirs and assigns, to one and his executors administrators and assign.

employee ownership, employee stock ownership plan, joint ownership