half-term adjective 1half term noun 1forms 2 adjective1 •(UK) Pertaining to the half term school holiday.The Roystones took advantage of the long half-term break and went to Paris. — 1992 half term noun1 •(UK) A short school holiday in the middle of the term, generally lasting a week.I have just visited him at his mother's home where he is spending half term and we reminisced while looking at his photo album. — 1979 formshalf terms · half-terms