Does "He posted the bond" mean "Zimmerman publically anounced the bond (on a website)"?

In many Western countries, if a judge decides it is appropriate, some accused criminals may be released "on bail" to await their trial, rather than do so in custody, if they or their friends or relatives or a professional moneylender (a "bondsman" who charges a fee) pay a sum of money - decided ("set") by the judge - to the court. The money is returned if they attend the trial and kept by the justice department if they abscond. In the USA the money is a called a "bond" (promise [to attend court]), and paying it is called "posting bond".

No. When you post bond or someone pays for you, you pay a lump sum payment to a bondsman in the states or to the court for your parole. This money is held until the trial and is then given back, provided you show up. Zimmerman's bond was for $1,000,000. Presumably, his parents house is worth at least this much, or they had help with the amount as his web page's begging did not come close to this total.

Thank you both.