true

Conforming to the actual state of reality or fact; factually correct.

This is a true story.

The humor of my proposition appealed more strongly to Miss Trevor than I had looked for, and from that time forward she became her old self again;[…]. Now she had come to look upon the matter in its true proportions, and her anticipation of a possible chance of teaching him a lesson was a pleasure to behold.

Conforming to the actual state of reality or fact; factually correct.

True, I have only read part of the book, but I like it so far.

Conforming to a rule or pattern; exact; accurate.

a true copy

a true likeness of the original

Of the state in Boolean logic that indicates an affirmative or positive result.

"A and B" is true if and only if "A" is true and "B" is true.

Loyal, faithful.

He’s turned out to be a true friend.

I really let you down / Next time I'll be true, yeah

Accurately; in alignment.

This gun shoots true.

If the tyre doesn't run true (it wobbles as you spin the wheel), re-seat it by letting most of the air out and pulling the tyre away from the bead.

Truthfully.

I tel you true my hart is ſwolne with wrath, On this ſame theeuish villain Tamburlain.

The state of being in alignment.

Some toolmakers are very careless when drilling the first hole through work that is to be bored, claiming that if the drilled hole comes out of true somewhat it can be brought true with the boring tool.

She clapped her hands happily, and he thought how pretty she was really, that is, the upper part of her face—from the bridge of the nose down she was somewhat out of true.

Truth.