What is the meaning of the phrase 'Maiden speech'?

♦ Maiden speech:
English meaning:
- A politician's maiden speech is the first speech that he or she makes in parliament after becoming a member of it.
- The first formal speech made by a British Member of Parliament in the House of Commons or by a member of the House of Lords.
Bangla meaning: প্রথম বক্তৃতা বা প্রথম ভাষণ।

Example: 
- I am most grateful for the opportunity to make my maiden speech in this debate.
- I spoke about referendums in my maiden speech and have done so on a number of other occasions.

প্রশ্নে উল্লেখিত অন্য অপশন গুলোর মধ্যে - 
Verbose Speech - A speech of too many words.
Natural Speech/language - First language.
Extempore speech - A speech made without any preparation.

Source: Cambridge & Collins Dictionary.