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From an opposite direction so as to strike or come in contact with; in contact with; upon; as, hail beats against the roof.

it the first act of hostility or offense; to begin a quarrel or controversy; to make an attack; -- with on.

The first attack, or act of hostility; the first act of injury, or first act leading to a war or a controversy; unprovoked attack; assault; as, a war of aggression. "Aggressions of power." Hallam

Tending or disposed to aggress; characterized by aggression; making assaults; unjustly attacking; as, an aggressive policy, war, person, nation. -- Ag*gres"sive*ly, adv. -- Ag*gres"sive*ness, n.

The person who first attacks or makes an aggression; he who begins hostility or a quarrel; an assailant. The insolence of the aggressor is usually proportioned to the tameness of the sufferer. Ames.

A receptacle of air in various parts of the system; as, a cell or minute cavity in the walls of the air tubes of the lungs; the air sac of birds; a dilatation of the air vessels in insects.

ed air is used to discharge the ball. The air is powerfully compressed into a reservoir attached to the gun, by a condensing pump, and is controlled by a valve actuated by the trigger.

A sudden attack; disturbance; broil. [R.] "These home alarms." Shak. Thy palace fill with insults and alarms. Pope.

An alarm from a real or threatened attack; a sudden attack; also, a bugle sound to give warning. "We have had an alert." Farrow. On the alert, on the lookout or watch against attack or danger; ready to act.

The segment of the body of an insect to which the wings are attached; the thorax. Kirby.

The act of tying together or attaching by some bond, or the state of being attached. [R.]

A slip of paper attached to a bill of exchange for receiving indorsements, when the back of the bill itself is already full; a rider. [A French usage] Abbott.

inspissated juice of several species of aloe, used as a purgative. [Plural in form but syntactically singular.] American aloe, Century aloe, the agave. See Agave.

ly: A machine for separating precious metals from earthy particles by bringing them in contact with a body of mercury with which they form an amalgam.

A person attached to a particular pursuit, study, or science as to music or painting; esp. one who cultivates any study or art, from taste or attachment, without pursuing it professionally.

blood vessels, and water tubes. These zones usually bear rows of locomotive suckers or tentacles, which protrude from regular pores. In star fishes they occupy the grooves along the under side of the rays.

A lying in a wood, concealed, for the purpose of attacking an enemy by surprise. Hence: A lying in wait, and concealed in any situation, for a like purpose; a snare laid for an enemy; an ambush.

A disposition or arrangement of troops for attacking an enemy unexpectedly from a concealed station. Hence: Unseen peril; a device to entrap; a snare. Heaven, whose high walls fear no assault or siege Or ambush from the deep. Milton.

Attachment to the United States.

Military stores, or provisions of all kinds for attack or defense. [Obs.]