Noun
Synonym of underscore
(fencing) The target area below the opponent's midriff.
Source: en.wiktionary.orgA low line of shore was visible at first on the right between the movement of the waves and fog, but when we came further it was lost sight of, and nothing could be seen but the mist curling in the rigging, and a small circle of foam. John Millington Synge
Named 'Low Line Commons', the winning proposal puts both nature and the local community at the heart of the project. Source: Internet