Adjective occasional has 3 senses
  1. occasional - occurring from time to time; "took an occasional glass of wine"
    Antonym:
    frequent (indirect, via infrequent)
  2. episodic, occasional - occurring or appearing at usually irregular intervals; "episodic in his affections"; "occasional headaches"
    Antonym: predictable (indirect, via unpredictable)
  3. casual, occasional - employed in a specified capacity from time to time; "casual employment"; "a casual correspondence with a former teacher"; "an occasional worker"
    Antonym: regular (indirect, via irregular)
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