v. t. [ L. concussus, p. p. of concutere. See Concussion. ] 1. To shake or agitate. “Concussed with uncertainty.” Daniel. [ 1913 Webster ]

2. (Law) To force (a person) to do something, or give up something, by intimidation; to coerce. Wharton. [ 1913 Webster ]

n. A violent shock or agitation. [ Obs. ] Bp. Hall. [ 1913 Webster ]

n. [ L. concussio, fr. concutere, concussum, to shake violenty; con- + quatere to shake. See Cashier, Quash. ] 1. A shaking or agitation; a shock; caused by the collision of two bodies. [ 1913 Webster ]

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. [ 1913 Webster ]

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. [ 1913 Webster ]

3. (Civil Law) The unlawful forcing of another by threats of violence to yield up something of value. [ 1913 Webster ]

Then concussion, rapine, pilleries,
Their catalogue of accusations fill. Daniel. [ 1913 Webster ]

Concussion fuse (Mil.), one that is ignited by the concussion of the shell when it strikes.

Syn. -- See Shock. [ 1913 Webster ]

a. Having the power or quality of shaking or agitating. Johnson. [ 1913 Webster ]

a. [ Pref. in- not + L. concussibilis that can be shaken. See Concussion. ] Not concussible; that cannot be shaken.