stadion

/stadion/

Cases

SingularPluralWhen to use it
nominativestadionthe stadiumstadionlathe stadiumsthe plain dictionary form — the doer of the sentence
genitivestadionnuthe stadium'sstadionlanıthe stadiums'the owner — whose it is
accusativestadionnuthe stadium (as the object)stadionlanıthe stadiums (as the object)a specific, known object — whom or what
dativestadiongato the stadiumstadionlağato the stadiumsdirection or recipient — to where, to whom
locativestadiondaat / in the stadiumstadionladaat / in the stadiumswhere it is; also having — mende bar, "I have it"
ablativestadiondanfrom the stadiumstadionladanfrom the stadiumswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
mystadionummy stadiumstadionlarımmy stadiums
yourstadionungyour stadiumstadionlarıngyour stadiums
his / herstadionuhis / her stadiumstadionlarıhis / her stadiums
ourstadionubuzour stadiumstadionlarıbızour stadiums
you all'sstadionuğuzyou all's stadiumstadionlarığızyou all's stadiums
theirstadionlarıtheir stadiumstadionlarıtheir stadiums

The overlap in the last rows is real, not a mistake: stadionları can mean "his / her stadiums", "their stadium", or "their stadiums" — context decides.