Arena

Japanese: arena

… A gymnasium consists of an area where physical education and sports activities take place and an area that supports those activities. The space where physical education and sports activities take place is generally called an arena or a stadium. There are no special rules for the dimensions and shape of an arena, except for the minimum dimensions and shapes set by the rules for some sports, such as volleyball. …

From [Mating Type]

… Some birds also practice promiscuity, with a curious social behavior called the lek. This is seen in birds such as the ruff and the prairie chicken. Every year during the breeding season, these males come to a group dance ground called an arena and perform a ritual display. This determines the hierarchy, and the high-ranking males mate with most of the females who visit, after which the females build nests and raise their chicks alone. …

From Brazil

...On the other hand, the military government, through Military Decree No. 2 of October 1965, changed presidential elections to indirect elections by the parliament and ordered the dissolution of all political parties. It then reintegrated existing political parties into two parties: the ruling party, the Alliance for National Renewal (ARENA), centered on the majority faction of the PSD and the UDN, and the opposition party, the Brazilian Democratic Movement (MDB), centered on the minority faction of the PSD and the PTB. The military government enacted a new constitution in March 1967, but because the opposition movement did not subside, it continued to issue military decrees and auxiliary decrees to strip anti-government figures of their civil rights and expel them from public office, while significantly reducing the power of the parliament. ...

*Some of the terminology that mentions "arena" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…　体育館は体育スポーツ活動を行う部分と，その活動を支える部分から構成される。体育スポーツ活動を行う空間は，一般的にアリーナarenaあるいは競技場などと呼ばれる。アリーナの寸法，形状はバレーボールなどいくつかのスポーツが，ルールで最低の寸法，形状を定めている以外は特別のきまりはない。…

【配偶型】より

…　鳥ではレックlekとよばれるおもしろい社会行動をともなう乱婚制もある。これはエリマキシギやソウゲンライチョウなどに見られるもので，毎年，繁殖期になるとこれらの雄はアレナarenaと呼ばれる集団踊場へやって来て，儀式的な誇示行動を行う。それによって順位がきまり，高順位のものがそこへやって来る雌のほとんどと交尾をし，雌はそののち単独で営巣し，ヒナを育てる。…

【ブラジル】より

…他方，軍事政権は65年10月の軍政令2号によって，大統領選挙を議会による間接選挙に改めると同時にすべての政党に解散を命じた。そのうえで，既存の政党をPSD多数派とUDNを中心とする与党国民刷新同盟(ARENA)と，PSD少数派とPTBを中心とする野党ブラジル民主運動(MDB)の2党へ再統合させた。軍事政権は67年3月に新憲法を施行したが，反対運動がおさまらなかったために，その後も軍政令とその補助令を連発して反政府人士の公民権剝奪･公職追放を行う一方，議会の権限を大幅に縮小した。…

※「arena」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典第２版について | 情報

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