irregular

Universal Words adjective, noun adjective 1 not arranged in an even way; not having an even, smooth pattern or shape: irregular teeth * an irregular outline 2 not happening at times that are at an equal distance from each other; not happening regularly: irregular meals * an irregular heartbeat * irregular attendance at school * He visited his parents at irregular intervals. 3 not normal; not according to the usual rules: an irregular practice * His behaviour is highly irregular. 4 (grammar) not formed in the normal way: an irregular verb 5 (of a soldier etc.) not part of a country's official army OPPREGULAR irregularly adverb noun a soldier who is not a member of a country's official army