What does random mean in English?

You can learn random Pronunciation, Grammar & Synonyms in this most authoritative English Dictionary.

random Meaning, Definition, Pronunciation, Grammar & Synonyms❤️

0 happening, done, or chosen by chance rather than according to a plan:
- random checks/tests/attacks
- We asked a random sample/selection of people what they thought.
- I just saw Billy wearing a top hat - he's so random!
- Some random guy walked in.
- The winning entry will be the first correct answer drawn at random.
1 an unknown or unexpected person:
- You can't make a whole movie with randoms off the street.
2 happening, done, or chosen by chance rather than according to a plan or pattern:
- a random sample
- He was stopped at the border in a random check.
- Dylan picked several books at random.
3 happening, done, or chosen by chance rather than following a system, plan, or rule:
- random audits/checks/tests They discussed the idea of carrying out random forensic audits on listed companies as a deterrent to fraud.
- The questionnaires are assigned on a random basis.
4 without involving any system or decision:
- chosen/drawn/selected at random The winner will be the first complete entry drawn at random after the closing date.

And what might be the underlying significance of these supposedly random acts of violence?
To my untutored eye that just looks like a load of random brush strokes and yet it's a very valuable painting.
It seems that the attack was a random act of violence.
The survey was carried out among a random sample of voters.
The security guards carried out random checks on people entering the building.
I'm not going to give my phone number to some random who asks for it.
She doesn't want to go on holiday with a load of randoms she doesn't know.
The empirical evidence shows that for some countries we can reject the hypothesis that exchange rates are random walks.