A vehicle or device propelled by thrust; refers to space-launch rockets, firework rockets, etc. (from English 'rocket').
新しいロケットが今夜打ち上げられる予定だ。
A new rocket is scheduled to be launched tonight.
子どもたちは公園で小さな紙のロケットを飛ばして遊んでいた。
The children were flying small paper rockets in the park.
その実験ではロケットの推進力を詳しく調べた。
In that experiment they examined the rocket's thrust in detail.