Smoke and fumes (for example from cooking or burning); the smoke and associated fire produced by burning.
換気扇が壊れて台所に煙火が充満した。
The kitchen filled with smoke because the exhaust fan was broken.
焚き火の煙火で目が痛くなった。
The smoke from the bonfire made my eyes hurt.
古いストーブは煙火が多く室内が汚れる。
Old stoves produce a lot of smoke and dirty the room.
A beacon or signal fire; a skyrocket/signal used to communicate (historical/older usage).
夜戦では山頂に煙火を上げて合図した。
In night battles they signalled by setting off beacons on the mountaintop.
見張り番は敵の接近を知らせるために煙火を用いた。
The sentry used signal fires to announce the enemy's approach.
Fireworks (used to refer to pyrotechnic displays, such as handheld sparklers or aerial fireworks).
夏祭りで町中に煙火が打ち上げられた。
Fireworks were launched all over town at the summer festival.
子どもたちは手持ちの煙火で楽しそうに遊んでいた。
The children happily played with handheld fireworks.
あの地方は伝統的な煙火大会で有名だ。
That region is famous for its traditional fireworks festival.