n. [ L. alligatio. ] 1. The act of tying together or attaching by some bond, or the state of being attached. [ R. ] [ 1913 Webster ]

2. (Arith.) A rule relating to the solution of questions concerning the compounding or mixing of different ingredients, or ingredients of different qualities or values. [ 1913 Webster ]

☞ The rule is named from the method of connecting together the terms by certain ligature-like signs. Alligation is of two kinds, medial and alternate; medial teaching the method of finding the price or quality of a mixture of several simple ingredients whose prices and qualities are known; alternate, teaching the amount of each of several simple ingredients whose prices or qualities are known, which will be required to make a mixture of given price or quality. [ 1913 Webster ]

n. [ L. caligatio, fr. caligare to emit vapor, to be dark, from caligo mist, darkness. ] Dimness; cloudiness. [ R. ] Sir T. Browne. [ 1913 Webster ]

n. [ L. colligatio. ] 1. A binding together. Sir T. Browne. [ 1913 Webster ]

2. (Logic) That process by which a number of isolated facts are brought under one conception, or summed up in a general proposition, as when Kepler discovered that the various observed positions of the planet Mars were points in an ellipse. “The colligation of facts.” Whewell. [ 1913 Webster ]

Colligation is not always induction, but induction is always colligation. J. S. Mill. [ 1913 Webster ]

n. [ Cf. F. déligation. ] (Surg.) A binding up; a bandaging. Wiseman. [ 1913 Webster ]

n. 1. The act of disobliging. [ 1913 Webster ]

2. A disobliging act; an offense. [ Obs. ] Clarendon. [ 1913 Webster ]

3. Release from obligation. Jer. Taylor. [ 1913 Webster ]

n. [ L. ligatio, fr. ligare to bind. Cf. Liaison. ] 1. The act of binding, or the state of being bound. [ 1913 Webster ]

2. That which binds; bond; connection. [ 1913 Webster ]

Tied with tape, and sealed at each fold and ligation. Sir W. Scott. [ 1913 Webster ]

n. [ F. obligation. L. obligatio. See Oblige. ] 1. The act of obligating. [ 1913 Webster ]

2. That which obligates or constrains; the binding power of a promise, contract, oath, or vow, or of law; that which constitutes legal or moral duty. [ 1913 Webster ]

A tender conscience is a stronger obligation than a proson. Fuller. [ 1913 Webster ]

3. Any act by which a person becomes bound to do something to or for another, or to forbear something; external duties imposed by law, promise, or contract, by the relations of society, or by courtesy, kindness, etc. [ 1913 Webster ]

Every man has obligations which belong to his station. Duties extend beyond obligation, and direct the affections, desires, and intentions, as well as the actions. Whewell. [ 1913 Webster ]

4. The state of being obligated or bound; the state of being indebted for an act of favor or kindness; -- often used with under to indicate being in that state; as, to place others under obligations to one. [ 1913 Webster ]

5. (Law) A bond with a condition annexed, and a penalty for nonfulfillment. In a larger sense, it is an acknowledgment of a duty to pay a certain sum or do a certain things. [ 1913 Webster ]

Days of obligation. See under Day. --
under obligation,
under an obligation. in a state of obligation{ 4 }. [ 1913 Webster +PJC ]

adj. relating or constituting or qualified to create a legal or financial obligation; as, obligational authority. [ WordNet 1.5 ]

n. [ L. profligatio. ] Defeat; rout; overthrow. [ Obs. ] Bacon. [ 1913 Webster ]

n. [ L. subligatio, from subligare to bind below; sub under + ligare to bind. ] The act of binding underneath. [ R. ] [ 1913 Webster ]