Definitions

1. adjective

not conforming to a regular pattern or standard

“The irregular shape of the rock made it difficult to climb.”

2. adverb

in an irregular or unpredictable manner

“He played the guitar irregularly, sometimes practicing for hours.”

3. noun

a person who does not follow a regular or official schedule

“As an irregular, he would be called in for shifts as needed by the hospital.”

4. noun

a chess move that does not follow the normal rules of the game

“The irregular in the chess match was the king’s move to the opposite corner of the board.”