(archaic) second-person singular simple present form of look

plural of lookalike

Constantly alert, intent on finding something or someone.

To remain vigilant for someone or something. / To remain vigilant for a possibly dangerous situation.

(computing, software compilation) The analysis in advance of subsequent decisions that would be made if a particular branch of an algorithm was followed.

plural of looker

plural of lookahead

(informal) Someone who looks things up

plural of lookbook

(archaic) simple past tense and past participle of look