What is the meaning of Ceilidh?

An informal social gathering, especially one where traditional Irish or Scottish folk music is played, with dancing and storytelling.

Ellipsis of ceilidh dance.

To attend a ceilidh (noun sense 1).

To dance a ceilidh dance.

inflection of ceil:

1. second-person plural imperative
2. third-person singular present indicative independent
3. second-person plural present indicative

second-person plural imperative

third-person singular present indicative independent

second-person plural present indicative

Source: wiktionary.org