WordNet

the amount by which the cost of a business exceeds its revenue; "the company operated at a loss last year"; "the company operated in the red last year" (同)red ink, red
gradual decline in amount or activity; "weight loss"; "a serious loss of business"
something that is lost; "the car was a total loss"; "loss of livestock left the rancher bankrupt"
the disadvantage that results from losing something; "his loss of credibility led to his resignation"; "losing him is no great deprivation" (同)deprivation
the act of losing someone or something; "everyone expected him to win so his loss was a shock"
the experience of losing a loved one; "he sympathized on the loss of their grandfather"
(physics) a short-lived oscillation in a system caused by a sudden change of voltage or current or load
one who stays for only a short time; "transient laborers"
an alert cognitive state in which you are aware of yourself and your situation; "he lost consciousness"

PrepTutorEJDIC

〈U〉(…を)『失うこと』,紛失《+『of』+『名』》 / 〈C〉(…の)『損害』,損失;損失額《+『of』+『名』》 / 〈U〉〈C〉(…に)『負けること』,(…の)敗北;失敗《+『of』+『名』》 / 〈U〉(状態・程度の)『減少』,低下 / 《複数形で》(戦場における)(人の)損害,此傷者数
《所有・所属》…『の』,…のものである,…に属する・《材料・要素》…『でできた』,から成る・《部分》…『の』[『中の』] ・《数量・単位・種類を表す名詞に付いて》…の・《原因・動機》…『で』,のために(because of) ・《主格関係》…『の』,による,によって・《目的格関係》…『を』,の・《同格関係》…『という』・《関係・関連》…『についての』[『の』],の点で・《抽象名詞などと共に》…の[性質をもつ] ・《『It is』+『形』+『of』+『名』+『to』 doの形で,ofの後の名詞を意味上の主語として》・《分離》…『から』・《起原・出所》…『から』[『の』](out of) ・《『名』+『of』+『a』(『an』)+『名』の形で》…のような・《『名』+『of』+『mine』(『yours, his』など独立所有格)の形で》…の…・《時》(1)《副詞句を作って》…に《形容詞句を作って》…の・《時刻》《米》…前(to,《米》before)
(また transitory)一時の,つかの間の,はかない / (人が)短期滞在の / (ホテルなどの)短期滞在客
意識,知覚 / (個人や集団の)意識,精神,意見
負ける,損をする,勝ち目がない