Competition or contest — when individuals or organizations vie for the same goal or resources (used in business, sports, academics, etc.).
新しい企業が参入して市場の競争が激しくなった。
With a new company entering, competition in the market intensified.
学生たちは奨学金をめぐって激しい競争を繰り広げた。
Students engaged in fierce competition for scholarships.
価格競争のために品質を落とすべきではない。
We shouldn't lower quality because of price competition.
In biology: competition between organisms or species for limited resources (food, habitat), affecting ecology and evolution.
干ばつの影響で、植物間の水分を巡る競争が激化した。
Due to the drought, competition among plants for moisture intensified.
外来種は在来種との競争に勝ち、生態系を変えたことがある。
Invasive species have sometimes outcompeted native species and altered ecosystems.