"One of the nine honorable ordinaries, consisting of two broad bands of the width of the bar, issuing, respectively from the dexter and sinister bases of the field and conjoined at its center." -- Webster 1913
Thank you, Webster, perhaps you could go clean the toilets and I could have a go explaining chevrons.
From the French for 'rafter', it is the familiar invented V. When placed on a shield it points upward, without touching the top, and leaves a triangular bite below it.
In theory it contains a third of the area of the shield; in practice it never does. Even alone on a shield it wouldn't, but is often met with between three other objects, perhaps roses or lozenges (diamonds), or two stars above and a lion's head below, and these and the chevron are drawn to give the best fit. A shield divided into two parts by a single V-shaped line is described as per chevron.
A diminutive chevron is called a chevronel, normally met with in groups, one on top of another as in military stripes, with a chevronel-shaped space between them through which the original colour of the field is visible.
A peculiar device in which several chevrons occur horizontally and interlinked is described as chevronels braced.
As with a fess, a chevron described as embattled has the battlement decoration only on the upper side.
It is very rare in heraldry to have a chevron reversed, that is hanging down from the top of the field like an upright V, though this design is very familiar outside heraldry, as in clothing.