Appui

• (n.) A support or supporter; a stay; a prop. • (n.) The mutual bearing or support of the hand of the rider and the mouth of the horse through the bit and bridle.
Found on http://thinkexist.com/dictionary/meaning/appui/

Appui

Ap`pui' noun [ French, from Latin ad + podium foothold, Greek ..., dim. of ..., ..., foot.] A support or supporter; a stay; a prop. [ Obsolete] « If a vine be to climb trees that are of any great height, there would be stays and appuies set to it. Holland. �...
Found on http://www.encyclo.co.uk/webster/A/110

appui

A support or supporter; a stay; a prop. 'If a be to climb trees that are of any great height, there would be stays and appuies set to it.' (Holland) Point d'appui . [F, a point of support. ... A given point or body, upon which troops are formed, or by which are marched in line or column. An advantageous defensive support, as a castle, morass, wood,...
Found on http://www.encyclo.co.uk/local/20973

appui

to support militarily
Found on http://phrontistery.info/a.html
No exact match found