Easier means less difficult than something else. Much easier, easier than expected, it gets easier.
It is the comparative of easy, formed by changing the y to i and adding -er, which is the rule for two-syllable adjectives ending in y. Common fixed phrases: easier said than done, take it easier, easier on the eye. Note that it gets easier is one of the most-said sentences in English about grief, parenthood and learning, and that the superlative is easiest, formed the same way.
1adjectiveeasierLess difficult than something else.
“The second one is far easier than the first.”
easier is a comparison of difficulty.