Lowland \Low"land\, n. Land which is low with respect to the neighboring country; a low or level country; -- opposed to highland. [1913 Webster]

The Lowlands, Belgium and Holland; the Netherlands; also, the southern part of Scotland. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

lowland adj : of relatively low or level country [ant: upland]

noun

low level country [ant: highland]

Source: WordNet (r) 2.0
 

Lowland \Low"land\, n. Land which is low with respect to the neighboring country; a low or level country; -- opposed to highland.

The Lowlands, Belgium and Holland; the Netherlands; also, the southern part of Scotland.

Source: Webster's Revised Unabridged Dictionary (1913)