Meaning of deadly In English

• 0 likely to cause death:

  • a deadly virus

  • a deadly weapon

• 1 complete or extreme:

  • They have been deadly enemies ever since Mark stole Greg's girlfriend.

• 2 extremely boring:

  • The party was deadly.

• 3 completely or extremely:

  • I thought she was joking but she was deadly serious.

• 4 dangerous and able to kill:

  • a deadly poison