A low hill or ridge, especially one found in chalk or limestone terrain; a geographical feature in British English.
From Old English 'bōstæl' or related to 'bostel', possibly connected to Proto-Germanic roots meaning 'dwelling' or 'shelter', reflecting how people named landscape features near settlements.
British place names are full of these geographic terms—'bostal' appears in locations like 'Bostal Green' because early people named features based on practical details of the landscape that mattered for living there.
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