Struts meaning : Protuberance, air pressure To swell; protuberate; bulge or spread out. (originally said of fowl) To stand or walk stiffly, with the tail erect and spread out. To walk proudly or haughtily. To cause to swell; enlarge; give more importance to. To protrude; cause to bulge. A proud step or walk, with the head erect; affected dignity in walking. A support rod. An instrument for adjusting the pleats of a ruff. To brace or support by a strut or struts; hold in place or strengthen by an upright, diagonal, or transverse support.