Definitions
There are 2 meanings of the phrase
At First Sight.
At First Sight - as an adverb
On first seeing (someone or something); immediately
Example: "It was love at first sight"
Synonyms (Exact Relations)
at first glanceExample Sentences
"They fell in love at first sight."
"She knew it was the perfect job for her at first sight."
"The car seemed in good condition at first sight, but had many hidden issues."
"They seemed like a happy couple at first sight, but their relationship was far from perfect."
"The puzzle seemed daunting at first sight, but once I started, it became easier."