GLIMPSE, catch/get a glimpse of, see, spot, spy, make out, pick out, sight, have sight of; poetic/literary espy, descry.
→ sight
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catch sight of
To get a glimpse of
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Main Entry: ↑catch
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catch sight of
To get a glimpse of, begin to see
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Main Entry: ↑sight
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Isuddenly notice; glimpse
II catch (or get a) sight of
glimpse for a moment; suddenly notice
when she caught sight of him she smiled
Useful english dictionary. 2012.