~ 1
■ verb
1》 (of a bird) descend from the air and settle.
2》 formal descend from public transport.
3》 ( ~ on ) chance to notice.
Origin
OE ālīhtan , from ā- (as an intensifier) + līhtan 'descend' (see light 3 ).
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~ 2
■ adverb & adjective
1》 on fire.
2》 shining brightly.
Origin
ME: prob. from the phr. on a light (= lighted) fire .