When a person’s lips come together to express affection or respect for another person, this results in a kiss. This word can be used as a verb or as a noun.
She’s kissing him on the cheek. (verb)
She’s giving him a kiss. (noun)
They’re kissing each other on the lips.
He’s kissing her hand.
In these sentences, the word "kiss" is a noun:
Give your grandmother a kiss goodbye.
The wedding ceremony ended with a kiss.
The actress blew kisses to her admirers.
In the next set of sentences, the word "kiss" is a verb. The "ed" ending for the past tense or past participle for "kiss" makes a "t" sound:
simple
past
past participle
kiss
kissed
kissed
John kissed his wife goodbye.
Diane kissed her children goodnight.
George is 23 years old and he has never kissed a girl before.
There are a few expressions that use the word "kiss."
No one in the office likes Alice because she always kisses up to the boss. (kiss up to = to complement or flatter someone excessively for the purpose of gaining an advantage)
You can kiss your promotion goodbye if you don’t do what the president of the company asks you to do. (kiss goodbye = to abandon; lose an opportunity)
An early frost was the kiss of death for our tomato plants. (kiss of death = an event or signal that something is going to end or die.)
