Definitions:

1. A stone pillar having a rectangular cross section tapering towards a pyramidal top. NOUN
   • Tourists marveled at the intricate carvings adorning the base of the obelisk, depicting scenes from ancient Egyptian life.
2. A tall, four-sided, narrow pillar that tapers towards the top and ends in a pyramid-like shape. NOUN
   • The Washington Monument is a famous modern obelisk in the United States.
3. A tall, square, tapered, stone monolith topped with a pyramidal point, frequently used as a monument. NOUN
   • The obelisk served as a focal point for public gatherings and religious ceremonies in ancient times.

Synonyms:

• memorial
• monolith
• monument
• Pillar
• spire