What's the difference between "friends" and "acquaintances"?

You've met someone twice through a coworker. Are they a friend? Probably not yet. But what about the person you've worked next to for three years and still don't know their last name? English has a whole range of words for exactly this kind of in-between, and most of it comes down to how well you know someone, not just how often you see them.

Strangers

At the bottom of the ladder are strangers, people you have no connection to at all. If you're at a party and three people you've never met keep trying to talk to you, they're strangers. The word just means you don't know each other yet.

A couple of ways this comes up:

• Some stranger kept trying to talk to us at the party last night.
• I wouldn't get in a car with a complete stranger, even if they seem nice.

Acquaintances and associates

One step up are acquaintances and associates. These are people you know a little, but not too well. It usually means someone you've met through work, through a mutual friend, or run into a handful of times. Enough to recognize them and make small talk, but not enough to call them up out of the blue.

"Associate" leans slightly more professional. It often describes someone tied to work specifically. "Acquaintance" is broader and can apply to anyone you know casually, regardless of context.

A few examples:

• Clara’s more of an acquaintance, really. We've only met a couple of times through mutual friends.
• Karim’s a business associate of mine.

Colleagues

Colleagues sit in a category of their own, because the workplace blurs the line between people you know and people you're genuinely friends with. Some colleagues stay strictly professional. Others become real friends over time. It depends entirely on the two people involved.

A couple of examples:

• David is just my colleague, but we get along fine at work.
• My colleagues and I grab lunch together most days, but we don't really hang out outside of that.

Different types of friends

Friends are the people you have a real personal relationship with, not just familiarity. You talk to them, joke around with them, and generally know more about their life than you would an acquaintance's.

Within "friend," there's a lot of range in how casual the word gets. "Pal," "buddy," and "sidekick" are all informal ways to refer to a friend. "Bestie" refers specifically to someone's closest friend. It’s more casual and often more affectionate than just saying "best friend."

A "partner in crime" is a friend you get into mischief with, someone who's usually up for whatever you're doing. A "confidant" is different. It describes a friend you trust enough to share private thoughts or problems with.

Some of these terms come from other languages and have become common in everyday English. "Amigo," from Spanish, is one example. It's used casually, the same way "buddy" or "pal" would be.

Here’s how they might sound in conversation:

• Shaun's my amigo. We've known each other since college.
• She's not just a friend; she's my confidant. I tell her everything.
• My partner in crime and I are already planning our next road trip.
• Joan's been my bestie since we were kids.

When a friendship runs deeper

Some friendships go further than the usual definition, and English has terms for that too. A "roll dog" is someone who's ready to go wherever you're going, no questions asked. A "ride or die" is a friend who sticks with you no matter what, through good situations and bad ones. A "day one" is someone who's been there since the beginning, before you had much else going on.

There's also a way of describing a friend who feels like family without actually being related. "A brother from another mother" or "a sister from another mister" both describe that kind of bond.

A few examples:

• She's been my day one since we were seven years old.
• Ben’s my ride or die.
• My roll dog and I are heading to the concert together tonight.
• We're not related, but he's basically my brother from another mother.

As human beings, we're wired for connection. But knowing who plays which role in your life is just as important as having the connections at all. Some people are your 3 am call. Others are your coffee-break regulars.

And if one person somehow covers both? Lucky you.