Concussion

n.	1.	A shaking or agitation; a shock; caused by the collision of two bodies. It is believed that great ringing of bells, in populous cities, hath dissipated pestilent air; which may be from the concussion of the air. - Bacon.
	2.	(Med.) A condition of lowered functional activity, without visible structural change, produced in an organ by a shock, as by fall or blow; as, a concussion of the brain.
	3.	(Civil Law) The unlawful forcing of another by threats of violence to yield up something of value. Then concussion, rapine, pilleries, Their catalogue of accusations fill. - Daniel. Concussion fuse (Mil.) one that is ignited by the concussion of the shell when it strikes.

Noun	1.	concussion - injury to the brain caused by a blow; usually resulting in loss of consciousness
	2.	concussion - any violent blow

CONCUSSION, civ. law. The unlawful forcing of another by threats of violence to give something of value. It differs from robbery in this, that in robbery the thing is taken by force, while in concussion it is obtained by threatened violence. Hein. Lec. El, Sec. 1071

To dream that you have a concussion, suggests that you are not utilizing your fullest potential. You need to be more responsive to others, instead of just sitting back and waiting for things to happen.abrasion, appulse, beating, blemish, blow, break, brunt, buffeting, bulldozing, bulling, bump, burn, cannon, carambole, carom, chafe, check, chip, clash, clip, clout, collision, crack, crack-up, crackle, crash, craze, crump, crunch, cut, encounter, flash burn, fracture, fray, frazzle, gall, gash, hammering, hurt, impact, impingement, incision, injury, jar, jarring, jolt, jolting, laceration, lesion, mauling, meeting, mortal wound, mutilation, onslaught, percussion, pounding, puncture, ramming, rent, repercussion, rip, run, rupture, scald, scorch, scrape, scratch, scuff, second-degree burn, shaking, shock, sideswipe, slash, sledgehammering, smash, smash-up, smashing, sore, stab, stab wound, tear, third-degree burn, thrusting, trauma, whomp, wound, wounds immedicable, wrench