Use LESS to factor out a CSS rule (e.g. font-size: 20px; ) - less

Question

How would you define a CSS style (e.g. font-size: 20px), and reuse it in multiple places with LESS?
According to the LESS docs, I can use variables for keys (e.g. font-size), identifiers (e.g. .myClass), and values (e.g. 20px). However, I'm not seeing an ability to do general rules like this.
Example in SCSS:
Define a mixin
#mixin large-text {
font-size: 20px;
}
Use it elsewhere
.MyAwesomeTitle {
color: red;
#include large-text;
}
Result:
.MyAwesomeTitle {
color: red;
font-size: 20px;
}

Answer 1

Define the mixin. While the leading . makes it look like a class selector, it's just how naming mixins works in LESS.
.large-text() {
font-size: 20px;
}
You include a mixin by just writing the name of the mixin. In this case it's .large-text.
.MyAwesomeTitle {
color: red;
.large-text
}
The docs give an example under "parametric mixins"
Input:
.wrap() {
text-wrap: wrap;
white-space: -moz-pre-wrap;
white-space: pre-wrap;
word-wrap: break-word;
}
pre { .wrap }
Output:
pre {
text-wrap: wrap;
white-space: -moz-pre-wrap;
white-space: pre-wrap;
word-wrap: break-word;
}