21st

Thân thiện

The 21st century began on January 1, 2001.

Definition

Adjective: - Coming next after the twentieth in position: This word is an ordinal number used to describe something that occupies the position number twenty-one in a sequence.

Usage

The word "21st" is used to indicate the position of an item, event, or date in an ordered series. It is most commonly seen in written dates and formal lists. - It is typically written with the numeral "21" followed by the letters "st" as a superscript (21ˢᵗ) or on the same line (21st). - It follows the pattern of ordinal numbers ending in "1" (like 1st, 21st, 31st), which take the suffix "-st".

Examples

• Dates:
  • We will celebrate on the 21st of October.
  • Her birthday is July 21st.
• Sequences and Lists:
  • This is the 21st edition of the annual conference.
  • He finished in 21st place in the marathon.

Advanced Usage

• "21st century": A common phrase referring to the current century, the years from 2001 to 2100. It is often used to discuss modern ideas, technology, or challenges.
  • Digital literacy is a crucial skill for the 21st century.
• Used in formal titles or names to denote a sequence.
  • He is the 21st Earl of Warwick.

Variants and Related Words

• Twenty-first (Adjective): The full written form of "21st".
  • We are studying the twenty-first chapter.
• Twenty-one (Cardinal Number): The number 21, used for counting.
  • There are twenty-one students in the class.

Synonyms

• Twenty-first: The direct synonym and full word form.

Notes

• "21st" is the standard abbreviation. The spoken form is always "twenty-first".
• Do not confuse with the cardinal number "twenty-one" (21), which is used for quantity, not order.

Học thuật

Adjective

1. coming next after the twentieth in position

Từ đồng nghĩa

• twenty-first