Translation

混雑した / 満員の / 人混みの多い

Meaning

Having a large number of people or things packed closely together.

Examples

• The beach was crowded with tourists on the sunny day.
  晴れた日には、ビーチは観光客で混雑していた。
• It's hard to walk in the crowded market.
  混雑した市場では歩くのが大変だ。