Fetching details from the dictionary...

greeting; greetings; salutation; salute; polite set phrase used when meeting or parting from someone
speech (congratulatory or appreciative); address
reply; response
courtesy visit (to offer condolences, say congratulations, pay respect, introduce oneself, etc.)
revenge; retaliation
a fine thing to say
朝の挨拶をすることは大切です。
Morning greetings are important.
結婚式で新郎が挨拶をしました。
At the wedding, the groom gave a speech.
毎朝、近所の人に挨拶をします。
I greet my neighbors every morning.