Thin or dilute; having low density or concentration (e.g., thin air, a dilute solution); also used for sparse populations.
高地になるほど空気は希薄になるので注意が必要だ。
Be careful because the air becomes thin the higher you go.
この実験では希薄な溶液を用いて反応速度を調べた。
In this experiment a dilute solution was used to study the reaction rate.
辺鄙な地域は人口が希薄だ。
Remote areas have sparse populations.
Lacking intensity or substance; thin in enthusiasm, interest, or content—insubstantial or tenuous (e.g., weak interest, flimsy evidence).
若者の政治への関心は希薄だと言われている。
It is said that young people's interest in politics is weak.
その主張は根拠が希薄で説得力に欠ける。
That claim is weakly supported and lacks persuasiveness.
交流が減り、人間関係が希薄になっている。
Interaction has decreased and human relationships have become tenuous.