The meaning of Wave-to

verb

To raise your hand and move it from side to side as a greeting, or to get someone's attention or give information

Usage examples:

[ i ] she leaned out the window and waved (good-bye)., [ m ] as soon as we showed our papers as jou…

noun

A larger than usual number of events of a similar, often bad, type, happening within the same period

Usage examples:

A wave of sth during the recession there was a wave of bankruptcies and mass unemployment., a crime…