flanker

noun

1. A player who plays in the back row of the scrum.
2. A wide receiver who lines up behind the line of scrimmage.
3. A fortification or soldier projecting so as to defend another work or to command the flank of an assailing body.

   “[The planters’ houses] were frequently constructed with flankers and loopholes, for the purpose of firing upon the assailants when they approached so near.”

   “It was in vain they threw out flankers, and endeavored to dislodge their assailants; each pause gave time for other pursuers to come within reach, and open attacks from different quarters.”

4. One of a pair of large upright monoliths erected on either end of the recumbent, in recumbent stone circles of Aberdeenshire, Scotland, and the counties of Cork and Kerry in south-west of Ireland.
5. A usually lower-end brand or product introduced in order to target competitors and protect a company's main market share.
6. Newly created perfume that shares some attributes of an already existing perfume.

verb

1. (obsolete)To defend by lateral fortifications.

   “the Castle was neither ſo weakly mann'd nor flanker'd as they were made belive”

2. (obsolete)To attack sideways.

   “1670, John Evelyn, Sylva or, A Discourse of Forest-Trees, and the Propagation of Timber in His Majesties Dominions, London, Chapter 3, “Of the Oak,” p. 19, […] to my observation in our Climates, where those sharp winds do rather flanker than blow fully opposite upon our Plantations, they thrive best […]”