1To lower or reduce something (a value, level, height, intensity); a transitive verb meaning to make something lower.
室温を低めるためにエアコンの設定温度を下げた。
I lowered the air-conditioner setting to reduce the room temperature.
声を低めて落ち着いた雰囲気で話した。
I lowered my voice and spoke in a calm tone.
期待を低めておけば、失望も少なくて済む。
If you lower your expectations, you'll be less disappointed.