crawl

• crawl [intransitive]
• 1 to move along on your hands and knees with your body close to the ground
• crawl along/across etc
• The baby crawled across the floor.
• 2 if an insect crawls, it moves using its legs
• crawl over/up etc
• There's a bug crawling up your leg.
• 3

  crawl into/out of bed

   to get into or out of bed slowly because you are very tired:
• We crawled into bed at 2 am.
• 4 if a vehicle crawls, it moves forward very slowly
• crawl by/along etc
• The traffic was crawling along.
• 5 British English informal to be too pleasant or helpful to someone in authority, especially because you want them to help you - used in order to show disapproval
• crawl to
• She's always crawling to the boss.
• 6

  be crawling with something

   to be completely covered with insects, people etc:
• The floor was crawling with ants.
• The whole place was crawling with cops.
• 7

  crawl the Net/web

   if a computer program crawls the Net, it quickly searches the Internet to find the particular information you need [↪ spider]:
• robots that crawl the net searching out e-mail addresses for junk mailing

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.