DECLAMATION - its defination

What is declamation?

According to yourdictionary.com
Declamation means a speech with feeling, or refers to the act of reciting a speech or rhetoric.
A political speech that is a great piece of rhetoric and that inspires others is an example of a declamation.
When you deliver a political speech intended to rally supporters and intimidate opponents, this is an example of declamation.

From speechanddebate.org
Declamation requires students to select a speech that was delivered in public and perform an excerpt of that speech to an audience.

From Merriam Webster:
expressing feelings or opinions in a way that is loud and forceful

HISTORY: Wikipedia.org
In Ancient Rome, declamation was a genre of ancient rhetoric and a mainstay of the Roman higher education system. It was separated into two component subgenres, the controversia, speeches of defense or prosecution in fictitious court cases, and the suasoria, in which the speaker advised a historical or legendary figure as to a course of action. Roman declamations survive in four corpora: the compilations of Seneca the Elder and Calpurnius Flaccus, as well as two sets of controversiae, the Major Declamations and Minor Declamations spuriously attributed to Quintilian. 

Declamation had its origin in the form of preliminary exercises for Greek students of rhetoric: works from the Greek declamatory tradition survive in works such as the collections of Sopater and Choricius of Gaza. Of the remaining Roman declamations the vast majority are controversiae; only one book of suasoriae survive, that being in Seneca the Elder's collection. The controversia as they currently exist normally consist of several elements: an imaginary law, a theme which introduced a tricky legal situation, and an argument which records a successful or model speech on the topic. It was normal for students to employ illustrative exempla from Roman history and legend (such as were collected in the work of Valerius Maximus) to support their case. Important points were often summed up via pithy epigrammatic statements (sententiae). Common themes include ties of fidelity between fathers and sons, heroes and tyrants in the archaic city, and conflicts between rich and poor men.
As a critical part of rhetorical education, declamation's influence was widespread in Roman elite culture. In addition to its didactic role, it is also attested as a performative genre: public declamations were visited by such figures as Pliny the Elder, Asinius Pollio, Maecenas, and the emperor Augustus. The poet Ovid is recorded by Seneca the Elder as being a star declaimer, and the works of the satirists Martial and Juvenal, as well as the historian Tacitus, reveal a substantial declamatory influence. Later examples of declamation can be seen in the work of the sixth century AD bishop and author Ennodius.