Definisi : adj 1. keenly perceptive, shrewd, tajam + approp n: an ~ critic, seorang pengkritik yg tajam kritikannya; an ~ businessman, ahli perniagaan yg tajam perkiraannya; 2. sensitive, keen, tajam: an ~ sense of smell, deria bau yg tajam; ~ hearing, pendengaran yg tajam; 3. critical, genting, runcing: an ~ shortage of steel, masalah kekurangan keluli yg genting; 4. intense, amat sangat: ~ distress, kesedihan yg amat sangat; ~ pains in the chest, rasa sakit yg amat sangat di dada; 5. (of illness) akut, mendadak: ~ appendicitis, apendisitis akut; an ~ attack of pneumonia, serangan pneumonia yg mendadak; 6. ( math) a. (of angle) tirus: ~ angle, sudut tirus; b. (of triangle) bersudut tirus. (Kamus Inggeris-Melayu Dewan)