noun, na-adjective
low spirits; lack of enthusiasm; unmotivated
Wasei-eigo from 'low tension'. Describes a person's mood or energy level being low, often in contrast to ハイテンション. Common in casual conversation.
from English low tension
See also: ハイテンション
今日はローテンションだから、どこにも行きたくない。
I'm feeling low today, so I don't want to go anywhere.
彼はいつもローテンションで、あまり話さない。
He's always low-energy and doesn't talk much.
noun
low voltage; low tension (electrical)
Rare technical use in electrical engineering, directly from English 'low tension'. Not used in everyday Japanese.
この回路はローテンションで動作する。
This circuit operates at low voltage.