harassment

Oppressive and unreasonable conduct directed at an individual, including repeated and unwanted attempts to communicate in a manner likely to cause distress or fear. Harassment is an offence under the Protection from Harassment Act 1997 as amended by the Protection of Freedoms Act 2012. It may be a civil offence or a criminal offence.

This definition is abridged from A – Z of tree terms: A companion to British arboriculture.
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