Watch the video or read the post. Or both. Whichever you prefer.
In the English language, each letter of the alphabet represents one sound.
The Egyptian language is not always so. Some hieroglyphs - many of the most frequently used signs - do represent a single consonant, like in English; for example, the owl sign is the letter m. It's called a 1-consonant sign.
However, some signs represent two or three consonants (as I mentioned in the previous post, the Egyptians didn't write vowels; all hieroglyphs represent consonants). For example, the hieroglyph for 'house' represented the sounds p and r, making pr (say, 'per'). Two consonants. Therefore, the house glyph is a 2-consonant sign.
Here's a few more examples (click on the picture to pop open a bigger version):
Some of these may already be familiar to you:
You may see alternative sets of terms being used by some Egyptologists:
Coming next: Gardiner's sign list