(transitive or intransitive) To suddenly do worse than others; to become out-of-date or to fail to keep up with others. / Used other than figuratively or idiomatically: see stand, behind.

(transitive) To increase or to succeed at a rate lower than (something else). / (transitive) To follow (someone) slowly, usually surreptitiously.

(transitive) To use someone or something as a shield in order to avoid taking responsibility for something; to avoid attention by using someone or something as a shield.

Used other than figuratively or idiomatically: see lie, behind. / To be the ultimate cause of.

(transitive or intransitive) To fail to keep pace; to fail to keep up with one's peers; to achieve or impress less than one's peers; to move more slowly than one's peers.

simple past tense and past participle of trail behind

Third-person singular simple present indicative form of lay behind

present participle of lie behind

past participle of lie behind

simple past tense and past participle of lay behind