[UNDER-1 6 b.] A minor feature in a landscape; a small elevation.
1879. Cassell’s Techn. Educ., IV. 115/2. All the small outlying features, such as hillocks or ridges;… the details of these ‘under-features’ [are] sketched in.
1900. Daily News, 10 March, 5/6. The whole … Division, which was lying in front of the enemy’s left, concealed by an underfeature.
