Cor"ol*la*ry (k?r"?l-l?-r?; 277), n.; pl. Corollaries (- r&?;z). [L. corollarium gift, corollary, fr. corolla. See Corolla.] 1. That which is given beyond what is actually due, as a garland of flowers in addition to wages; surplus; something added or superfluous. [Obs.]

Now come, my Ariel; bring a corollary,
Rather than want a spirit.
Shak.

2. Something which follows from the demonstration of a proposition; an additional inference or deduction from a demonstrated proposition; a consequence.

• Something given beyond what is actually due; something added or superfluous.
  
• Something which occurs as a result of another effort without significant additional effort.
        Finally getting that cracked window fixed was a nice corollary of redoing the whole storefont.
  
• (math) A proposition which follows easily from the proof of another proposition.
        We have proven that this set is finite and well ordered. As a corollary, we now know that there is an order-preserving map from it to the natural numbers.